Light field alignment and bonding method and system

Abstract

The application discloses a light field alignment and bonding method and system, and belongs to the field of intelligent monitoring devices, wherein the method comprises the following steps: S100, presetting a plane alignment coding mark on a light field coding layer; the plane alignment coding mark can generate visual plane alignment features after being coupled with a grating; S200, superimposing the light field coding layer and the grating, and performing pre-processing before bonding; S300, based on the visual plane alignment features, physically adjusting the relative position of the grating and the light field coding layer, and converting 3D light field space alignment into 2D plane feature alignment; S400, observing the visual plane alignment features through an intelligent monitoring device; when the visual plane alignment features match preset standard features, it is determined that the accurate alignment and bonding of the grating and the light field coding layer are completed. The application can judge the alignment correction condition by observing the color change of the coding mark, and there is no need to pay attention to 3D effects, so there is no need to repeatedly observe from left to right.

Description

Technical Field

[0001] This invention relates to the field of 3D static light field alignment and bonding, and particularly to a light field alignment and bonding method and system. Background Technology

[0002] In the field of 3D static display, 3D static light field alignment and bonding is generally done manually by human eye. Since the human eye cannot accurately determine the position of the 3D display, multiple left-right observations and comparisons are required. This also makes it impossible to achieve symmetrical display from left to right and vertically, placing excessive demands on the operator's experience. Alignment quality varies from person to person, accuracy cannot be guaranteed, and efficiency is low. In static light field grating alignment and bonding, machine vision solutions have certain requirements for the bonding material. Because gratings are transparent materials, they significantly affect the recognition rate of machine vision, failing to meet the requirements for accurate alignment and high efficiency. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a light field alignment and bonding method and system, which can determine the alignment correction status by observing the color change of the coded mark, without needing to focus on the 3D effect, and therefore eliminating the need for repeated observation of centering left and right.

[0004] One embodiment of the present invention provides a light field alignment and bonding method, comprising the following steps: S100, presetting planar alignment coding marks on a light field coding layer, wherein the planar alignment coding marks, after being coupled with a grating, can generate visual planar alignment features; S200, superimposing the light field coding layer and the grating, and performing pre-bonding preprocessing; S300, based on the visual planar alignment features, physically adjusting the relative positions of the grating and the light field coding layer, transforming 3D light field spatial alignment into 2D planar feature alignment; S400, observing the visual planar alignment features through an intelligent monitoring device, and determining that the precise alignment and bonding of the grating and the light field coding layer is completed when the visual planar alignment features match the preset standard features.

[0005] According to some embodiments of the present invention, in step S300, the physical adjustment includes a graded adjustment step of coarse positioning and fine correction.

[0006] According to some embodiments of the present invention, the method further includes: pre-establishing a one-to-one correspondence between misalignment state, visual plane alignment features, and physical adjustment direction; in step S300, the physical adjustment includes: after observing the visual plane alignment features, determining and executing a unique physical adjustment direction according to the preset correspondence, until the visual plane alignment features match the preset standard features.

[0007] According to some embodiments of the present invention, the method further includes: automatically acquiring the alignment features of the visualized plane through a machine vision component, and automatically outputting the physical adjustment direction and displacement of the grating according to a preset correspondence.

[0008] According to some embodiments of the present invention, the planar alignment coding marks are distributed in the edge region of the light field coding layer and are arranged symmetrically.

[0009] According to some embodiments of the present invention, in step S200, the pretreatment before bonding includes the process steps of applying bonding adhesive and pressing and spreading the adhesive.

[0010] According to some embodiments of the present invention, the visualized planar alignment features are generated based on the dispersion and imaging characteristics of the grating, and are used to determine whether the alignment is accurate by marking the color distribution and morphological changes.

[0011] According to some embodiments of the present invention, the planar alignment coding marks are distributed around the light field coding layer and include a first group of marks, a second group of marks, and a third group of marks; the line thickness and overall size of the three groups of marks are different from each other, wherein the first group of marks are precision positioning marks, the second group of marks are alignment position restriction marks, and the third group of marks are middle position coarse adjustment marks; the planar alignment coding marks are symmetrically arranged, with the left and right marks symmetrically set, the upper and lower marks consistent, and the middle vertical mark is a BGR stripe; when performing alignment adjustment, coarse adjustment is first completed by adjusting the middle position coarse adjustment mark, then positioning is completed by restricting the alignment position restriction mark, and finally the final alignment calibration is completed by the precision positioning mark.

[0012] According to some embodiments of the present invention, the method specifically includes the following steps: placing the light field coding layer on a bonding platform, applying UV adhesive, laying the grating flat on top of the adhesive, and uniformly coating the adhesive using a pressing roller; first observing the vertical center mark and the left and right center marks in the planar alignment coding marks, and initially aligning the grating with the light field coding layer; then observing the visual planar alignment features formed by the planar alignment coding marks at the four corners, adjusting the relative position of the grating with the light field coding layer until the visual planar alignment features match the preset standard features, thus completing the alignment of the grating with the light field coding layer.

[0013] Another embodiment of the present invention provides a light field alignment and bonding system, comprising: a bonding platform; a light field encoding layer disposed on the bonding platform, the light field encoding layer having preset planar alignment encoding marks; a grating superimposed and cooperating with the light field encoding layer, the planar alignment encoding marks and the grating being coupled to generate visual planar alignment features; an adjustment mechanism for physically adjusting the relative position of the grating and the light field encoding layer, converting 3D light field spatial alignment into 2D planar feature alignment; and an intelligent monitoring device for observing the visual planar alignment features, and when the visual planar alignment features match preset standard features, completing the precise alignment and bonding of the grating and the light field encoding layer.

[0014] The embodiments of the present invention achieve at least the following beneficial effects: The embodiments of the present invention determine the alignment correction by simply observing the color change of the coded mark, without needing to pay attention to the 3D effect, and therefore do not require repeated observation of centering left and right.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a flowchart illustrating the method according to an embodiment of the present invention.

[0018] Figure 2 This is a diagram illustrating the encoding effect of an embodiment of the present invention.

[0019] Figure 3 This is a precise positioning mark for planar alignment encoding according to an embodiment of the present invention.

[0020] Figure 4 This is a positional constraint mark for planar alignment encoding according to an embodiment of the present invention.

[0021] Figure 5 This is a coarse adjustment mark for the middle position of a planar alignment encoding according to an embodiment of the present invention.

[0022] Figure 6 This is a diagram showing the effect of planar alignment encoding according to an embodiment of the present invention when the light field alignment is accurate and without offset.

[0023] Figure 7 This is an observation diagram of the middle pattern when the grating and the encoding map are offset to the left in a planar alignment encoding according to an embodiment of the present invention.

[0024] Figure 8This is an observation diagram of the left-side encoding effect when the grating and encoding map are offset to the left in a planar alignment encoding according to an embodiment of the present invention.

[0025] Figure 9 This is an observation diagram of the right-side encoding effect when the grating and encoding map are offset to the left in a planar alignment encoding according to an embodiment of the present invention. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] To address the issues of low efficiency and low yield when using static light field alignment and 3D imagery for alignment correction without a reference, this invention proposes a light field alignment method. Encoded markers are applied around the perimeter of the 3D static light field encoded image. These markers interact with a grating to form alignment marks, which are used to determine the position of the grating relative to the encoded image. Since the coded markers and the left and right sides of the grating can be considered planar patterns, the 3D alignment effect is converted into 2D planar alignment, thus improving alignment efficiency.

[0029] Reference Figure 1 This invention provides a method for optical field alignment and bonding, comprising the following steps:

[0030] S100. Preset planar alignment coding marks on the light field coding layer. After the planar alignment coding marks are coupled with the grating, they can generate visual planar alignment features.

[0031] S200: Overlay the light field encoding layer with the raster and perform pre-processing before bonding;

[0032] S300: Based on the visual planar alignment features, the relative positions of the grating and the light field coding layer are physically adjusted to transform the 3D light field spatial alignment into 2D planar feature alignment.

[0033] S400: The visual plane alignment features are observed through an intelligent monitoring device. When the visual plane alignment features match the preset standard features, it is determined that the precise alignment and bonding of the grating and the light field coding layer has been completed.

[0034] In some embodiments, step S300 includes a graded adjustment step of coarse positioning and fine correction.

[0035] In some embodiments, the method of the present invention further includes: pre-establishing a one-to-one correspondence between misalignment state, visual plane alignment features and physical adjustment direction; in step S300, physical adjustment includes: after observing the visual plane alignment features, determining and executing a unique physical adjustment direction according to the preset correspondence, until the visual plane alignment features match the preset standard features.

[0036] In some embodiments, the method of the present invention further includes: automatically acquiring visual planar alignment features through a machine vision component, and automatically outputting the physical adjustment direction and displacement of the grating according to a preset correspondence.

[0037] In some embodiments, planar alignment coding markers are distributed in the edge region of the light field coding layer and are arranged symmetrically.

[0038] In some embodiments, step S200, the pretreatment before bonding includes the process steps of applying bonding adhesive and pressing and spreading the adhesive.

[0039] In some embodiments, the visual planar alignment features are generated based on the dispersion and imaging properties of the grating, and are used to determine whether the alignment is accurate by marking the color distribution and morphological changes.

[0040] In some embodiments, planar alignment coding marks are distributed around the light field coding layer and include a first group of marks, a second group of marks, and a third group of marks. The line thickness and overall size of the three groups of marks are different from each other. The first group of marks are precision positioning marks, the second group of marks are alignment position restriction marks, and the third group of marks are middle position coarse adjustment marks. The planar alignment coding marks are symmetrically arranged, with the left and right marks symmetrically set, the upper and lower marks consistent, and the middle vertical mark is a BGR stripe. When performing alignment adjustment, coarse adjustment is first completed by adjusting the middle position coarse adjustment mark, then positioning is completed by restricting the alignment position restriction mark, and finally, the final alignment calibration is completed by the precision positioning mark.

[0041] In some embodiments, the method of the present invention specifically includes the following steps: placing the light field coding layer on the bonding platform, applying UV adhesive, laying the grating flat on top of the adhesive, and uniformly applying the adhesive using a pressing roller; first observing the vertical center mark and the left and right center marks in the planar alignment coding marks, and initially aligning the grating with the light field coding layer; then observing the visual planar alignment features formed by the planar alignment coding marks at the four corners, adjusting the relative position of the grating with the light field coding layer until the visual planar alignment features match the preset standard features, thus completing the alignment of the grating with the light field coding layer.

[0042] like Figure 2 The image shown is a set of encoding effect diagrams. The gray area in the middle is the content encoding area, and the nine areas around it are the encoding mark areas. The left and right marks are symmetrical, the top and bottom marks are consistent, and the vertical mark in the middle is a BGR stripe. The three sets of marks are shown below. Figure 3 , Figure 4 , Figure 5 As shown. This embodiment proposes an encoding approach, namely the grating dispersion of color blocks, and the encoding can be set according to personal preference and ease of observation.

[0043] When the light field is precisely aligned without any offset, the effect of each mark is as follows: Figure 6 As shown, with tag encoding Figure 1 The image is simply magnified (due to the grating magnification). When the grating is offset to the left from the coded image, the middle pattern appears as follows when viewed. Figure 7 As shown. When observing the code on the left side... Figure 8 As shown. When observing the code on the right... Figure 9 As shown.

[0044] This invention proposes a light field alignment and bonding system, comprising: a bonding platform; a light field encoding layer disposed on the bonding platform, wherein the light field encoding layer has preset planar alignment encoding marks; a grating superimposed on the light field encoding layer, wherein the planar alignment encoding marks and the grating are coupled to generate a visual planar alignment feature; an adjustment mechanism for physically adjusting the relative position of the grating and the light field encoding layer, thereby converting 3D light field spatial alignment into 2D planar feature alignment; and an intelligent monitoring device for observing the visual planar alignment feature, wherein when the visual planar alignment feature matches a preset standard feature, the precise alignment and bonding of the grating and the light field encoding layer is completed.

[0045] Although specific embodiments are described herein, those skilled in the art will recognize that many other modifications or alternative embodiments are also within the scope of this disclosure. For example, any of the functions and / or processing capabilities described in connection with a particular device or component can be performed by any other device or component. Furthermore, while various exemplary embodiments and architectures have been described according to embodiments of this disclosure, those skilled in the art will recognize that many other modifications to the exemplary embodiments and architectures described herein are also within the scope of this disclosure.

[0046] The foregoing description, with reference to block diagrams and flowcharts of systems, methods, systems, and / or computer program products according to exemplary embodiments, has described certain aspects of this disclosure. It should be understood that one or more blocks in the block diagrams and flowcharts, as well as combinations of blocks in the block diagrams and flowcharts, can be implemented by executing computer-executable program instructions, respectively. Similarly, according to some embodiments, some blocks in the block diagrams and flowcharts may not need to be executed in the order shown, or may not all need to be executed. Furthermore, additional components and / or operations beyond those shown in the blocks in the block diagrams and flowcharts may exist in some embodiments.

[0047] Therefore, blocks in block diagrams and flowcharts support combinations of means for performing a specified function, combinations of elements or steps for performing a specified function, and program instruction means for performing a specified function. It should also be understood that each block in a block diagram and flowchart, and combinations of blocks in block diagrams and flowcharts, can be implemented by a dedicated hardware computer system or a combination of dedicated hardware and computer instructions that performs a specific function, element, or step.

[0048] The program modules, applications, etc., described herein may include one or more software components, including, for example, software objects, methods, data structures, etc. Each such software component may include computer-executable instructions that, in response to execution, cause at least a portion of the functionality described herein (e.g., one or more operations of the exemplary methods described herein) to be performed.

[0049] Software components can be coded using any of a variety of programming languages. An exemplary programming language could be a low-level programming language, such as assembly language associated with a specific hardware architecture and / or operating system platform. Software components including assembly language instructions may need to be converted into executable machine code by an assembler before being executed by the hardware architecture and / or platform. Another exemplary programming language could be a higher-level programming language that is portable across multiple architectures. Software components including higher-level programming languages ​​may need to be converted into an intermediate representation by an interpreter or compiler before execution. Other examples of programming languages ​​include, but are not limited to, macro languages, shell or command languages, job control languages, scripting languages, database query or search languages, or report writing languages. In one or more exemplary embodiments, a software component containing instructions from one of the above-described programming language examples can be executed directly by the operating system or other software components without first being converted into another form.

[0050] Software components can be stored as files or other data storage structures. Software components of similar type or related function can be stored together in a specific directory, folder, or library. Software components can be static (e.g., pre-defined or fixed) or dynamic (e.g., created or modified at runtime).

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method for optical field alignment and bonding, characterized in that, Includes the following steps: S100. A planar alignment coding mark is preset on the light field coding layer. After the planar alignment coding mark is coupled with the grating, a visual planar alignment feature can be generated. S200: Overlay the light field encoding layer with the grating and perform pre-processing before bonding; S300. Based on the visualized planar alignment features, physically adjust the relative positions of the grating and the light field encoding layer to transform the 3D light field spatial alignment into 2D planar feature alignment. S400. The visual plane alignment features are observed by an intelligent monitoring device. When the visual plane alignment features match the preset standard features, it is determined that the precise alignment and bonding of the grating and the light field coding layer is completed. The visualized planar alignment features are generated based on the dispersion and imaging characteristics of the grating, and are used to determine whether the alignment is accurate by marking the color distribution and morphological changes. The planar alignment coding marks are distributed around the light field coding layer and include a first set of marks, a second set of marks, and a third set of marks; The three sets of markers have different line thicknesses and overall dimensions. The first set of markers is a precise positioning marker, the second set of markers is a positioning constraint marker, and the third set of markers is a coarse adjustment marker for the middle position. The planar alignment coding marks are symmetrically arranged, with the left and right marks set symmetrically, the upper and lower marks being consistent, and the vertical mark in the middle being a BGR stripe; When performing alignment adjustments, first complete the coarse adjustment by adjusting the middle position coarse adjustment mark, then position the alignment by limiting the alignment position limit mark, and finally complete the final alignment calibration by precisely positioning the mark. The method specifically includes the following steps: Place the light field encoding layer on the bonding platform, apply UV adhesive, lay the grating flat on the adhesive, and apply the adhesive evenly through the pressing rollers. First, observe the vertical center mark and the left and right center marks in the planar alignment coding marks, and initially align the raster with the light field coding layer; Then observe the visual planar alignment features formed by the planar alignment coding marks at the four corners, adjust the relative positions of the raster and the light field coding layer until the visual planar alignment features match the preset standard features, and complete the alignment of the raster and the light field coding layer.

2. The optical field alignment and bonding method according to claim 1, characterized in that, In step S300, the physical adjustment includes a graded adjustment step of coarse positioning and fine correction.

3. The optical field alignment and bonding method according to claim 1, characterized in that, The method further includes: Establish a one-to-one correspondence between misalignment, visual planar alignment features, and physical adjustment directions in advance; In step S300, the physical adjustment includes: After observing the visual plane alignment features, a unique physical adjustment direction is determined and executed according to a preset correspondence until the visual plane alignment features match the preset standard features.

4. The optical field alignment and bonding method according to claim 3, characterized in that, The method further includes: automatically acquiring the alignment features of the visualized plane through a machine vision component, and automatically outputting the physical adjustment direction and displacement of the grating according to a preset correspondence.

5. The optical field alignment and bonding method according to claim 1, characterized in that, The planar alignment coding marks are distributed in the edge region of the light field coding layer and are arranged symmetrically.

6. The optical field alignment and bonding method according to claim 1, characterized in that, In step S200, the pretreatment before bonding includes the process steps of applying bonding adhesive and pressing and spreading the adhesive.

7. A light field alignment and bonding system for performing the method as described in any one of claims 1 to 6, characterized in that, include: Fits the platform; A light field encoding layer is set on the bonding platform, and the light field encoding layer has preset planar alignment encoding marks; A grating, superimposed and combined with the light field coding layer, generates a visual planar alignment feature after the planar alignment coding mark is coupled with the grating; The adjustment mechanism is used to physically adjust the relative position of the raster and the light field encoding layer, converting the 3D light field spatial alignment into 2D planar feature alignment. An intelligent monitoring device is used to observe the alignment features of the visualized plane. When the alignment features of the visualized plane match the preset standard features, the precise alignment and bonding of the grating and the light field coding layer is completed.

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