Display optical module and display equipment

Abstract

The embodiment of the invention provides a display optical module and display equipment, the display optical module comprises a first optical element and a second optical element which are attached to each other, the first optical element is provided with a first alignment structure, the second optical element is provided with a second alignment structure, and the first alignment structure and the second alignment structure are opposite along a first direction; the first alignment structure receives the initial detection light source advancing along the initial light path, and changes the initial light path of the initial detection light source into a first alignment light path to obtain a first alignment light source; the second alignment structure receives the first alignment light source and changes a first alignment light path of the first alignment light source into a second alignment light path to obtain a second alignment light source; the first optical parameters of the first alignment light source and the second alignment light source are equal, or the second optical parameters of the first alignment light source and the second alignment light source meet preset conditions. And judging whether the two alignment structures are aligned or not according to the change of the optical parameters so as to judge whether the two optical elements realize high-precision alignment or not.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of optical lens alignment, and in particular to a display optical module and a display device. Background Art

[0002] The display optical module of the display device usually includes a plurality of lenses. When assembling the display optical module, the plurality of lenses need to be aligned so that the main optical axes of the plurality of lenses coincide with each other to realize the output of the light source.

[0003] In the related art, the method for aligning multiple lenses includes: using an image recognition system to obtain an edge contour image of each lens, fitting edge lines based on the edge contour image to obtain the outer contour of each lens, and calculating the center of the outer contour, and finally using a mechanical device to displace the lens according to the center to achieve alignment.

[0004] However, due to the influence of image contrast and shadow, certain errors will occur when obtaining the outer contour of the lens, and the calculated center of the lens outer contour is not accurate, resulting in low alignment accuracy, which affects the imaging quality of the display device. Summary of the invention

[0005] The embodiments of the present disclosure provide a display optical module and a display device to overcome the problem of poor imaging quality of the display device caused by low lens alignment accuracy.

[0006] In a first aspect, an embodiment of the present disclosure provides a display optical module, comprising: a first optical element and a second optical element that are bonded together, the first optical element being provided with a first alignment structure, the second optical element being provided with a second alignment structure, the first alignment structure and the second alignment structure being opposite to each other along a first direction; the first alignment structure being used to receive an initial detection light source traveling along an initial light path, and being used to change the initial light path of the initial detection light source into a first alignment light path to obtain a first alignment light source; the second alignment structure being used to receive the first alignment light source, and being used to change the first alignment light path of the first alignment light source into a second alignment light path to obtain a second alignment light source; wherein the first optical parameters of the first alignment light source and the second alignment light source are equal, or the second optical parameters of the first alignment light source and the second alignment light source meet preset conditions.

[0007] In a second aspect, an embodiment of the present disclosure provides a display device, which includes the display optical module described above.

[0008] In the display optical module and display device provided in the present embodiment, the display optical module respectively sets a first alignment structure and a second alignment structure on the first optical element and the second optical element that are bonded together, and emits a detection light source into the first alignment structure and the second alignment structure. According to the change of the optical parameters of the detection light source, it is determined whether the first alignment structure and the second alignment structure are aligned, thereby determining whether the first optical element and the second optical element are aligned, which effectively solves the problem of low alignment accuracy when aligning any two lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0010] Figure 1 An exemplary diagram of the cross-sectional structure of the first optical element and the second optical element provided in an embodiment of the present disclosure;

[0011] Figure 2 An example of a cross-sectional structure of a display optical module provided in the first embodiment of the present disclosure Figure 1 ;

[0012] Figure 3 An example of a cross-sectional structure of a display optical module provided in the first embodiment of the present disclosure Figure 2 ;

[0013] Figure 4 Schematic diagram of a light source provided in the first embodiment of the present disclosure passing through a first through hole and a second through hole Figure 1 ;

[0014] Figure 5 Schematic diagram of a light source provided in the first embodiment of the present disclosure passing through a first through hole and a second through hole Figure 2 ;

[0015] Figure 6 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 1 ;

[0016] Figure 7 This is a top view structural example diagram of a display optical module provided in the second embodiment of the present disclosure;

[0017] Figure 8 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 2 ;

[0018] Fig. 9An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 3 ;

[0019] Fig.10 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 4 ;

[0020] Fig.11 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 5 .

[0021] Reference numerals:

[0022] 100: a first optical element;

[0023] 101: first optical element body; 102: first moving platform;

[0024] 110: central axis of optical element; 120: central axis of alignment structure;

[0025] 1021: first surface; 1022: second surface;

[0026] 10211: first arc-shaped focusing lens; 10221: first arc-shaped groove;

[0027] 200: second optical element;

[0028] 201: second optical element body; 202: second moving platform;

[0029] 2021: third surface; 2022: fourth surface;

[0030] 20211: second arc groove;

[0031] 300: first alignment structure;

[0032] 400: Second alignment structure;

[0033] a: initial detection light source; b: first alignment light source; c: second alignment light source. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0035] In the related art, when an image recognition system is used to obtain the edge contour image of each lens, the obtained edge contour image has certain errors due to the influence of image contrast and shadow, and the calculated center of the lens outline is not accurate, resulting in low alignment accuracy, which affects the imaging quality of the display device.

[0036] The embodiments of the present disclosure provide a display optical module and a display device to solve the above problems.

[0037] refer to Figure 1 , Figure 1 The cross-sectional structure example diagram of the first optical element and the second optical element provided in the embodiment of the present disclosure, the display optical module includes a first optical element 100 and a second optical element 200, the first optical element 100 and the second optical element 200 are arranged along a first direction ( Figure 1 The first optical element 100 is arranged up and down in the vertical direction shown in FIG. 1 , and the first optical element 100 is located above the second optical element 200, and the first optical element 100 and the second optical element 200 are in contact with each other. When the central axis of the first optical element 100 and the central axis of the second optical element 200 both coincide with the central axis 110 of the optical element, it indicates that the first optical element 100 and the second optical element 200 are aligned.

[0038] The first optical element 100 is provided with a first alignment structure, and the second optical element 200 is provided with a second alignment structure. The first alignment structure and the second alignment structure are arranged along a first direction ( Figure 1 When the central axis of the first alignment structure and the central axis of the second alignment structure both coincide with the central axis 120 of the alignment structure, it indicates that the central axis of the first optical element 100 and the central axis of the second optical element 200 also coincide with the central axis 110 of the optical element.

[0039] The first alignment structure is used to receive the initial detection light source traveling along the initial light path, so that the initial detection light source enters the first optical element 100 from the first alignment structure. When the initial detection light source enters the first alignment structure, the first alignment structure will change the optical path of the initial detection light source, so that the initial light path is changed to the first alignment light path, thereby obtaining the first alignment light source; the first alignment light source will be emitted from the first alignment structure out of the first optical element 100.

[0040] The second alignment structure is used to receive the first alignment light source, so that the first alignment light source enters the second optical element 200 from the second alignment structure. When the first alignment light source enters the second alignment structure, the second alignment structure will change the optical path of the first alignment light source, so that the first alignment light path is changed to the second alignment light path, thereby obtaining the second alignment light source; the second alignment light source will be emitted from the second alignment structure out of the second optical element 200.

[0041] The first optical parameters of the first alignment light source and the second alignment light source are equal, which means that the central axis of the first alignment structure and the central axis of the second alignment structure both coincide with the central axis 120 of the alignment structure.

[0042] Alternatively, the second optical parameters of the first alignment light source and the second alignment light source meet the preset conditions, indicating that the central axis of the first alignment structure and the central axis of the second alignment structure both coincide with the central axis 120 of the alignment structure.

[0043] The display optical module provided by the embodiment of the present disclosure includes a first optical element 100 and a second optical element 200 that are attached to each other. The first optical element 100 is provided with a first alignment structure, and the second optical element 200 is provided with a second alignment structure. The first alignment structure and the second alignment structure are aligned along a first direction ( Figure 1 ) relative to the vertical direction shown in ; the first alignment structure is used to receive the initial detection light source traveling along the initial light path, and is used to change the initial light path of the initial detection light source into the first alignment light path to obtain the first alignment light source; the second alignment structure is used to receive the first alignment light source, and is used to change the first alignment light path of the first alignment light source into the second alignment light path to obtain the second alignment light source; wherein, the first optical parameters of the first alignment light source and the second alignment light source are equal, or the second optical parameters of the first alignment light source and the second alignment light source meet the preset conditions. By respectively setting the first alignment structure and the second alignment structure on the first optical element 100 and the second optical element 200 that are bonded together, and injecting the detection light source into the first alignment structure and the second alignment structure, it is determined whether the first alignment structure and the second alignment structure are aligned according to the change of the optical parameters of the detection light source, thereby determining whether the first optical element and the second optical element are aligned, which effectively solves the problem of low alignment accuracy when any two lenses are aligned.

[0044] Among them, the first optical element and the second optical element of the embodiment of the present disclosure may include a curved lens, a flat lens, or a lens that combines a curved surface and a flat surface.

[0045] The display optical module provided by the embodiment of the present disclosure will be described in detail below through two embodiments.

[0046] Embodiment 1

[0047] refer to Figure 2 and Figure 3 , Figure 2 An example of a cross-sectional structure of a display optical module provided in the first embodiment of the present disclosure Figure 1 , Figure 3 An example of a cross-sectional structure of a display optical module provided in the first embodiment of the present disclosure Figure 2 .

[0048] The first optical element 100 includes a first optical element body 101, which may be a circular plane lens or a circular curved lens. A first movable platform 102 extends outwardly along the circumference of the edge of the first optical element body 101, and the first movable platform 102 may be a circular plane lens. A first alignment structure 300 is arranged on the first movable platform 102.

[0049] The second optical element 200 includes a second optical element body 201. The second optical element body 201 may be a circular plane lens. The second optical element body 201 is bonded to the first optical element body 101. The second optical element body 201 may also be a circular curved lens. The second optical element body 201 is bonded to the first optical element body 101 along the first direction ( Figure 2 The edge of the second optical element body 201 has a second movable platform 202 extending outward along its circumference, and the second movable platform 202 can be a circular plane lens. The second movable platform 202 is in contact with the first movable platform 102, and a second alignment structure 400 is arranged on the second movable platform 202.

[0050] A moving platform is arranged at the edge of the optical element body, and an alignment structure is arranged on the moving platform, which can not only realize the alignment of the optical element, but also avoid affecting the normal use of the optical element body.

[0051] In the first embodiment of the present disclosure, the first alignment structure 300 may include at least two, at least two first alignment structures 300 are arranged at intervals along the circumference of the first mobile platform 102; the second alignment structure 400 may also include at least two, at least two second alignment structures 400 are arranged at intervals along the circumference of the second mobile platform 202; each first alignment structure 300 corresponds to a second alignment structure 400 along the first direction ( Figure 2 At least two alignment structures simultaneously perform alignment detection, which can further ensure the accuracy of lens alignment.

[0052] refer to Figure 4 and Figure 5 , Figure 4 Schematic diagram of a light source provided in the first embodiment of the present disclosure passing through a first through hole and a second through hole Figure 1 , Figure 5 Schematic diagram of a light source provided in the first embodiment of the present disclosure passing through a first through hole and a second through hole Figure 2 In the first embodiment of the present disclosure, the first alignment structure 300 includes a first through hole, and the second alignment structure 400 includes a second through hole. The diameters of the first through hole and the second through hole are the same, the central axis of the first through hole and the central axis of the second through hole coincide, and the central axis of the first through hole is aligned with the first direction axis ( Figure 2 The vertical axis shown in FIG.

[0053] The initial detection light source a enters the first optical element 100 from the first alignment structure 300, wherein the inner wall of the first through-hole is used to receive the initial detection light source a. After the initial detection light source a is incident on the inner wall of the first through-hole, the inner wall of the first through-hole is also used to reflect the initial detection light source a, thereby changing the optical path of the initial detection light source a, and obtaining the first alignment light source b traveling along the first alignment light path. The first alignment light source b is emitted from the first alignment structure 300 to the first optical element 100.

[0054] The first alignment light source b enters the second optical element 200 from the second alignment structure 400, wherein the inner wall of the second through hole is used to receive the first alignment light source b. After the first alignment light source b is incident on the inner wall of the second through hole, the inner wall of the second through hole is also used to reflect the first alignment light source b, thereby changing the optical path of the first alignment light source b to obtain the second alignment light source c traveling along the second alignment light path. The second alignment light source c is emitted from the second alignment structure 400 to the second optical element 200.

[0055] The first optical parameters of the first aligned light source b and the second aligned light source c are equal, and the first optical parameters include light intensity.

[0056] like Figure 2 and Figure 4 As shown, the light intensity of the first alignment light source b is equal to the light intensity of the second alignment light source c, indicating that the light sources incident into the first through hole and the second through hole and reflected by the inner wall of the first through hole and the inner wall of the second through hole do not suffer energy loss, the central axis of the first through hole and the central axis of the second through hole coincide, the first alignment structure 300 and the second alignment structure 400 are aligned, and the first optical element 100 and the second optical element 200 are aligned.

[0057] like Figure 3 and Figure 5 As shown, the light intensity of the first alignment light source b is greater than the light intensity of the second alignment light source c, indicating that the light sources incident into the first through hole and the second through hole and reflected by the inner wall of the first through hole and the inner wall of the second through hole have a certain energy loss; wherein, the first alignment light source b obtained after being reflected by the inner wall of the first through hole, when entering the second through hole, has energy loss when the first alignment light source b is incident on the inner wall of the second through hole because the inner wall of the second through hole is not flush with the inner wall of the first through hole; that is, at this time, the central axis of the first through hole and the central axis of the second through hole do not coincide, the first alignment structure 300 and the second alignment structure 400 are not aligned, and the first optical element 100 and the second optical element 200 are not aligned.

[0058] The first embodiment of the present disclosure determines whether the first optical element 100 and the second optical element 200 are aligned by changes in the intensity of incident light and the intensity of emitted light. The structure is simple and accurate alignment can be achieved.

[0059] In the above-mentioned embodiment 1 of the present disclosure, a reflective medium layer is provided on the inner wall of the first through hole to reflect the initial detection light source a and the first alignment light source b; and a reflective medium layer is provided on the inner wall of the second through hole to reflect the second alignment light source c. The reflective medium layer has a high reflectivity, which reduces the absorption and scattering of the light source by the reflective medium layer.

[0060] Continue to refer Figure 2 and Figure 4 In the above-mentioned first embodiment of the present disclosure, the initial light path includes an initial incident angle e, and the first alignment light path and the second alignment light path both include multiple reflected light paths, and the incident angle of each reflected light path is the same as the initial incident angle e. That is to say, the first alignment light source b enters the second through-hole after multiple reflections in the first through-hole, and the second alignment light source c is emitted after multiple reflections in the second through-hole; at the same time, the incident angle of each reflected light path is the same as the initial incident angle e, ensuring that no energy loss occurs when the first alignment light source b and the second alignment light source c are reflected multiple times.

[0061] In the above-mentioned first embodiment of the present disclosure, the initial light path includes a single beam of light.

[0062] Embodiment 2

[0063] refer to Figure 6-Figure 11 , Figure 6 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 1 , Figure 7 This is a top view of the structure of the display optical module provided in the second embodiment of the present disclosure. Figure 8 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 2 , Fig. 9 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 3 , Fig.10 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 4 , Fig.11 An example of a cross-sectional structure of a display optical module provided in the second embodiment of the present disclosure Figure 5 .

[0064] The first optical element 100 includes a first optical element body 101, which may be a circular plane lens or a circular curved lens. A first movable platform 102 extends outwardly along the circumference of the edge of the first optical element body 101, and the first movable platform 102 may be a circular plane lens. A first alignment structure 300 is arranged on the first movable platform 102.

[0065] The second optical element 200 includes a second optical element body 201. The second optical element body 201 may be a circular plane lens. The second optical element body 201 is bonded to the first optical element body 101. The second optical element body 201 may also be a circular curved lens. The second optical element body 201 is bonded to the first optical element body 101 along the first direction ( Figure 6 The edge of the second optical element body 201 has a second movable platform 202 extending outward along its circumference, and the second movable platform 202 can be a circular plane lens. The second movable platform 202 is in contact with the first movable platform 102, and a second alignment structure 400 is arranged on the second movable platform 202.

[0066] A moving platform is arranged at the edge of the optical element body, and an alignment structure is arranged on the moving platform, which can not only realize the alignment of the optical element, but also avoid affecting the normal use of the optical element body.

[0067] refer to Figure 8 and Fig. 9 In the second embodiment of the present disclosure, the first mobile platform 102 has a first direction ( Figure 8 and Fig. 9 The second movable platform 202 has a first surface 1021 and a second surface 1022 opposite to each other in the vertical direction (as shown in FIG. 1 ), and the second movable platform 202 has a third surface 2021 and a fourth surface 2022 opposite to each other along the first direction, and the second surface 1022 and the third surface 2021 are in contact with each other.

[0068] The first alignment structure 300 includes a first arc-shaped focusing lens 10211 protruding from the first surface 1021, and the first alignment structure 300 also includes a first arc-shaped groove 10221 disposed on the second surface 1022, and the center of the first arc-shaped groove 10221 and the center of the first arc-shaped focusing lens 10211 are located on the same straight line ( Figure 8 and Fig. 9); wherein, the first curved focusing lens 10211 can be a semicircular convex lens arranged on the first surface 1021 or a curved convex lens with a certain radius of curvature, and the first curved focusing lens 10211 is used to receive the initial detection light source a. When the initial detection light source a enters the first curved focusing lens 10211, the first curved focusing lens 10211 is also used to refract the initial detection light source a to obtain a first alignment light source b traveling along the first alignment light path, and the first alignment light source b emits the first alignment structure 300 from the first curved groove 10221; that is, the first alignment light source b emits the first movable platform 102 from the first curved groove 10221.

[0069] The second alignment structure 400 includes a second arc-shaped groove 20211 disposed on the third surface 2021. The second arc-shaped groove 20211 and the first arc-shaped groove 10221 are aligned along the first direction ( Figure 8 and Fig. 9 The second arc-shaped groove 20211 and the first arc-shaped groove 10221 are relative to each other (the vertical direction shown in the figure), so that the second arc-shaped groove 20211 and the first arc-shaped groove 10221 jointly enclose an installation chamber, and the installation chamber is filled with a refractive medium to obtain a second arc-shaped focusing lens, which can be a circular convex lens or an elliptical convex lens with a certain radius of curvature; the second arc-shaped focusing lens is used to receive the first alignment light source b emitted from the first arc-shaped groove 10221. When the first alignment light source b enters the second arc-shaped focusing lens, the second arc-shaped focusing lens is also used to refract the first alignment light source b to obtain a second alignment light source c traveling along the second alignment light path. The second alignment light source c is emitted from the second arc-shaped groove 20211 and enters the second movable platform 202, and finally emitted from the fourth surface 2022 of the second movable platform 202.

[0070] In the above-mentioned second embodiment of the present disclosure, the second optical parameter includes focal length, and the focal length of the first aligned light source b and the focal length of the second aligned light source c satisfy the following preset conditions:

[0071]

[0072]

[0073]

[0074] Among them, f is the preset value, f 1 is the focal length of the first aligned light source b, f 2 is the focal length of the second light source c, f 1 and f 2 Satisfies the above formula ①.

[0075] n 1 is the refractive index of air, n 2is the refractive index of the first arc-shaped focusing lens 10211 and the first moving platform 102, n 3 is the refractive index of the second curved focusing lens, R 1 is the radius of curvature of the first arc-shaped focusing lens 10211, R 2 is the curvature radius of the first arc-shaped groove 10221, R 3 is the curvature radius of the second arc-shaped groove 20211, d 1 Along the first direction ( Figure 8 The vertical direction shown in FIG. 1 is from the highest point of the first arc-shaped focusing lens 10211 to the lowest point of the first arc-shaped groove 10221 (i.e. Figure 8 The distance from the highest point in 2 It is the distance from the lowest point of the first arc-shaped groove 10221 to the lowest point of the second arc-shaped groove 20211 along the first direction.

[0076] refer to Figure 6 , f is the preset value, when f 1 and f 2 When the above formula ① is satisfied, the focus of the first alignment light source b and the focus of the second alignment light source c are located at the same point, the first alignment structure 300 and the second alignment structure 400 are aligned, and the first optical element 100 and the second optical element 200 are aligned.

[0077] Fig.10 and Fig.11 , since the refractive index of air is n 1 , the refractive index n of the first arc focusing lens 10211 and the first moving platform 102 2 , the refractive index of the second curved focusing lens n 3 , the curvature radius R of the first arc-shaped focusing lens 10211 1 , the curvature radius R of the first arc-shaped groove 10221 2 , along the first direction ( Figure 8 The vertical direction shown in FIG. 1 is from the highest point of the first arc-shaped focusing lens 10211 to the lowest point of the first arc-shaped groove 10221 (i.e. Figure 8 The distance d from the highest point in 1 are all fixed values; and f is a preset value. 1 and f 2 When the above formula ① is not satisfied, the curvature radius R of the second arc-shaped groove 20211 is 3 , the distance d from the lowest point of the first arc-shaped groove 10221 to the lowest point of the second arc-shaped groove 20211 along the first direction 2 The focus of the first alignment light source b and the focus of the second alignment light source c do not overlap, the first alignment structure 300 and the second alignment structure 400 are not aligned, and the first optical element 100 and the second optical element 200 are not aligned.

[0078] refer to Figure 7 In the second embodiment of the present disclosure, the first alignment structure 300 may include at least two, at least two first alignment structures 300 are arranged at intervals along the circumference of the first movable platform 102; the second alignment structure 400 may also include at least two, at least two second alignment structures 400 are arranged at intervals along the circumference of the second movable platform 202; each first alignment structure 300 corresponds to a second alignment structure 400 along the first direction ( Figure 6 At least two alignment structures simultaneously perform alignment detection, which can further ensure the accuracy of lens alignment.

[0079] That is, the first surface 1021 of the first movable platform 102 may be provided with at least two first curved focusing lenses 10211 , and the at least two first curved focusing lenses 10211 are arranged at intervals along the circumference of the second movable platform 202 .

[0080] In the second embodiment of the present disclosure, the refractive medium may include liquid optical glue, and the liquid optical glue is filled in the installation chamber enclosed by the second arc-shaped groove 20211 and the first arc-shaped groove 10221.

[0081] The embodiment of the present disclosure also provides a display device, which includes the display optical module described above.

[0082] The display optical module of the embodiment of the present disclosure can be applied to a head-mounted augmented reality device or a head-mounted virtual reality device, but is not limited to the head-mounted augmented reality device or the head-mounted virtual reality device.

[0083] The display optical module and the display device provided by the embodiment of the present disclosure include a first optical element 100 and a second optical element 200 which are attached to each other. The first optical element 100 is provided with a first alignment structure, and the second optical element 200 is provided with a second alignment structure. The first alignment structure and the second alignment structure are aligned along a first direction ( Figure 1) relative to the vertical direction shown in ; the first alignment structure is used to receive the initial detection light source traveling along the initial light path, and is used to change the initial light path of the initial detection light source into the first alignment light path to obtain the first alignment light source; the second alignment structure is used to receive the first alignment light source, and is used to change the first alignment light path of the first alignment light source into the second alignment light path to obtain the second alignment light source; wherein, the first optical parameters of the first alignment light source and the second alignment light source are equal, or the second optical parameters of the first alignment light source and the second alignment light source meet the preset conditions. By respectively setting the first alignment structure and the second alignment structure on the first optical element 100 and the second optical element 200 that are bonded together, and injecting the detection light source into the first alignment structure and the second alignment structure, it is determined whether the first alignment structure and the second alignment structure are aligned according to the change of the optical parameters of the detection light source, thereby determining whether the first optical element and the second optical element are aligned, which effectively solves the problem of low alignment accuracy when any two lenses are aligned.

[0084] In a first aspect, according to one or more embodiments of the present disclosure, there is provided a display optical module, characterized in that it comprises a first optical element and a second optical element that are bonded to each other, a first alignment structure being arranged on the first optical element, and a second alignment structure being arranged on the second optical element, the first alignment structure and the second alignment structure being opposite to each other along a first direction; the first alignment structure is used to receive an initial detection light source traveling along an initial light path, and to change the initial light path of the initial detection light source into a first alignment light path to obtain a first alignment light source; the second alignment structure is used to receive the first alignment light source, and to change the first alignment light path of the first alignment light source into a second alignment light path to obtain a second alignment light source; wherein the first optical parameters of the first alignment light source and the second alignment light source are equal, or the second optical parameters of the first alignment light source and the second alignment light source meet preset conditions.

[0085] According to one or more embodiments of the present disclosure, the first optical element includes a first optical element body, an edge of the first optical element body has a first movable platform extending outward along its circumference, and the first movable platform is provided with the first alignment structure; the second optical element includes a second optical element body, the second optical element body is bonded to the first optical element body, an edge of the second optical element body has a second movable platform extending outward along its circumference, the second movable platform is bonded to the first movable platform, and the second alignment structure is provided on the second movable platform.

[0086] According to one or more embodiments of the present disclosure, the first alignment structure includes a first through-through hole, and the second alignment structure includes a second through-through hole, the diameters of the first through-through hole and the second through-through hole are the same, the central axis of the first through-through hole and the central axis of the second through-through hole coincide, and the central axis of the first through-through hole is parallel to the first direction axis; the inner wall of the first through-through hole is used to receive the initial detection light source, and to reflect the initial detection light source to obtain the first alignment light source traveling along the first alignment light path; the inner wall of the second through-through hole is used to receive the first alignment light source, and to reflect the first alignment light source to obtain the second alignment light source traveling along the second alignment light path; the first optical parameters of the first alignment light source and the second alignment light source are equal, and the first optical parameters include light intensity.

[0087] According to one or more embodiments of the present disclosure, an inner wall of the first through-hole and an inner wall of the second through-hole are both provided with a reflective medium layer.

[0088] According to one or more embodiments of the present disclosure, the initial optical path includes an initial incident angle, and the first alignment optical path and the second alignment optical path each include a plurality of reflected optical paths, and the incident angle of each reflected optical path is the same as the initial incident angle.

[0089] According to one or more embodiments of the present disclosure, the initial light path includes a single beam of light.

[0090] According to one or more embodiments of the present disclosure, the first movable platform has a first surface and a second surface opposite to each other along the first direction, the second movable platform has a third surface and a fourth surface opposite to each other along the first direction, the second surface and the third surface are in contact with each other; the first alignment structure includes a first arc-shaped focusing lens protruding from the first surface, the first alignment structure also includes a first arc-shaped groove arranged on the second surface, the center of the first arc-shaped groove and the center of the first arc-shaped focusing lens are located on the same straight line, the first arc-shaped focusing lens is used to receive the initial detection light source, and is used to refract the initial detection light source to obtain the first alignment light source traveling along the first alignment light path, ... The first alignment light source is emitted from the first arc-shaped groove; the second alignment structure includes a second arc-shaped groove arranged on the third surface, the second arc-shaped groove is opposite to the first arc-shaped groove along the first direction, the second arc-shaped groove and the first arc-shaped groove jointly enclose an installation chamber, the installation chamber is filled with a refractive medium, and a second arc-shaped focusing lens is obtained, the second arc-shaped focusing lens is used to receive the first alignment light source, and is used to refract the first alignment light source to obtain the second alignment light source traveling along the second alignment light path, and the second alignment light source is emitted from the second arc-shaped groove; the second optical parameter includes a focal length, and the focal length of the first alignment light source and the focal length of the second alignment light source meet the preset conditions.

[0091] According to one or more embodiments of the present disclosure, the preset conditions include:

[0092]

[0093]

[0094]

[0095] Among them, f is the preset value, f 1 is the focal length of the first aligned light source, f 2 is the focal length of the second light source, n 1 is the refractive index of air, n 2 is the refractive index of the first arc-shaped focusing lens and the first moving platform, n 3 is the refractive index of the second arc focusing lens, R 1 is the radius of curvature of the first arc-shaped focusing lens, R 2 is the curvature radius of the first arc-shaped groove, R 3 is the curvature radius of the second arc-shaped groove, d 1 is the distance from the highest point of the first arc-shaped focusing lens to the lowest point of the first arc-shaped groove along the first direction, d 2is the distance from the lowest point of the first arc-shaped groove to the lowest point of the second arc-shaped groove along the first direction.

[0096] According to one or more embodiments of the present disclosure, the refractive medium includes liquid optical glue.

[0097] According to one or more embodiments of the present disclosure, the first alignment structure includes at least two, and at least two of the first alignment structures are arranged at intervals along the circumference of the first mobile platform; the second alignment structure includes at least two, and at least two of the second alignment structures are arranged at intervals along the circumference of the second mobile platform; each of the first alignment structures corresponds to one of the second alignment structures opposite to each other along the first direction.

[0098] In a second aspect, according to one or more embodiments of the present disclosure, a display device is provided, which includes the display optical module described above.

[0099] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0100] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0101] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A display optical module, characterized in that: It comprises a first optical element and a second optical element which are bonded together, wherein a first alignment structure is arranged on the first optical element, and a second alignment structure is arranged on the second optical element, and the first alignment structure and the second alignment structure are opposite to each other along a first direction; The first alignment structure is used to receive an initial detection light source traveling along an initial light path, and to change the initial light path of the initial detection light source into a first alignment light path to obtain a first alignment light source; The second alignment structure is used to receive the first alignment light source, and to change the first alignment light path of the first alignment light source into a second alignment light path to obtain a second alignment light source; Wherein, the first optical parameters of the first alignment light source and the second alignment light source are equal, or the second optical parameters of the first alignment light source and the second alignment light source meet a preset condition.

2. The display optical module according to claim 1, characterized in that: The first optical element comprises a first optical element body, a first movable platform is extended outwardly along the circumference of the edge of the first optical element body, and the first alignment structure is arranged on the first movable platform; The second optical element includes a second optical element body, which is bonded to the first optical element body. A second movable platform is extended outward along the circumference of the edge of the second optical element body. The second movable platform is bonded to the first movable platform, and the second alignment structure is arranged on the second movable platform.

3. The display optical module according to claim 2, characterized in that: The first alignment structure includes a first through hole, the second alignment structure includes a second through hole, the first through hole and the second through hole have the same diameter, the central axis of the first through hole and the central axis of the second through hole coincide, and the central axis of the first through hole is parallel to the first direction axis; The inner wall of the first through hole is used to receive the initial detection light source and to reflect the initial detection light source to obtain the first alignment light source traveling along the first alignment light path; The inner wall of the second through hole is used to receive the first alignment light source and to reflect the first alignment light source to obtain the second alignment light source traveling along the second alignment light path; The first optical parameters of the first aligned light source and the second aligned light source are equal, and the first optical parameters include light intensity.

4. The display optical module according to claim 3, characterized in that: The inner wall of the first through hole and the inner wall of the second through hole are both provided with a reflective medium layer.

5. The display optical module according to claim 3, characterized in that: The initial light path includes an initial incident angle, and the first alignment light path and the second alignment light path each include a plurality of reflected light paths, and the incident angle of each reflected light path is the same as the initial incident angle.

6. The display optical module according to claim 3, characterized in that: The initial light path includes a single beam of light.

7. The display optical module according to claim 2, characterized in that: The first movable platform has a first surface and a second surface opposite to each other along the first direction, the second movable platform has a third surface and a fourth surface opposite to each other along the first direction, and the second surface and the third surface are in contact with each other; The first alignment structure includes a first arc-shaped focusing lens protruding from the first surface, and the first alignment structure also includes a first arc-shaped groove arranged on the second surface, the center of the first arc-shaped groove and the center of the first arc-shaped focusing lens are located on the same straight line, the first arc-shaped focusing lens is used to receive the initial detection light source and to refract the initial detection light source to obtain the first alignment light source traveling along the first alignment light path, and the first alignment light source is emitted from the first arc-shaped groove; The second alignment structure includes a second arc-shaped groove arranged on the third surface, the second arc-shaped groove is opposite to the first arc-shaped groove along the first direction, the second arc-shaped groove and the first arc-shaped groove jointly enclose a mounting chamber, the mounting chamber is filled with a refractive medium, and a second arc-shaped focusing lens is obtained, the second arc-shaped focusing lens is used to receive the first alignment light source, and is used to refract the first alignment light source to obtain the second alignment light source traveling along the second alignment light path, and the second alignment light source is emitted from the second arc-shaped groove; The second optical parameter includes a focal length, and the focal length of the first aligned light source and the focal length of the second aligned light source meet the preset condition.

8. The display optical module according to claim 7, characterized in that: The preset conditions include: Among them, f is a preset value, f1 is the focal length of the first alignment light source, f2 is the focal length of the second alignment light source, n1 is the refractive index of air, n2 is the refractive index of the first arc focusing lens and the first movable platform, n3 is the refractive index of the second arc focusing lens, R1 is the curvature radius of the first arc focusing lens, R2 is the curvature radius of the first arc groove, R3 is the curvature radius of the second arc groove, d1 is the distance from the highest point of the first arc focusing lens to the lowest point of the first arc groove along the first direction, and d2 is the distance from the lowest point of the first arc groove to the lowest point of the second arc groove along the first direction.

9. The display optical module according to claim 7, characterized in that: The refractive medium includes liquid optical glue.

10. The display optical module according to claim 3 or 7, characterized in that: The first alignment structures include at least two, and the at least two first alignment structures are arranged at intervals along the circumference of the first moving platform; The second alignment structures include at least two, and the at least two second alignment structures are arranged at intervals along the circumference of the second mobile platform; Each of the first alignment structures corresponds to and is opposite to one of the second alignment structures along the first direction.

11. A display device, characterized in that: A display optical module comprising any one of claims 1-10.

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