阅读说明：本技术 裸眼3d光栅膜角度的检测系统和检测方法 (Detection system and detection method for naked eye 3D grating film angle ) 是由 李应樵 陈增源 于 2021-07-21 设计创作，主要内容包括：本发明公开一种裸眼3D光栅膜角度的检测方法和检测系统,检测方法包括：将待测工件放置透明工作台上,待测工件包括盖板玻璃和贴合在盖板玻璃上方的光栅膜；采用设置在透明工作台下方的光源组件,对待测工件进行照射,形成待测光带；采用设置在透明工作台上方的机器视觉系统进行参数采集,获取待测光带对应的光带坐标参数和盖板玻璃对应的玻璃坐标参数；根据光带坐标参数和玻璃坐标参数,计算光栅膜与盖板玻璃的实测角度；若实测角度在标准角度范围内,则获取检测合格的检测结果。本发明的检测方法在裸眼3D产品组装显示屏之前,检测光栅膜贴合盖板玻璃时的角度是否合格,检测步骤简单,可以优化裸眼3D产品的组装工序,提高裸眼3D产品的组装效率。(The invention discloses a method and a system for detecting the angle of a naked eye 3D grating film, wherein the detection method comprises the following steps: placing a workpiece to be detected on a transparent workbench, wherein the workpiece to be detected comprises cover plate glass and a grating film attached above the cover plate glass; irradiating the workpiece to be measured by adopting a light source component arranged below the transparent workbench to form a light band to be measured; acquiring parameters by adopting a machine vision system arranged above the transparent workbench, and acquiring light band coordinate parameters corresponding to a light band to be detected and glass coordinate parameters corresponding to cover plate glass; calculating the actual measurement angle between the grating film and the cover plate glass according to the light band coordinate parameter and the glass coordinate parameter; and if the actual measurement angle is within the standard angle range, obtaining a detection result which is qualified in detection. According to the detection method, before the naked eye 3D product is assembled on the display screen, whether the angle of the grating film attached to the cover plate glass is qualified or not is detected, the detection steps are simple, the assembly process of the naked eye 3D product can be optimized, and the assembly efficiency of the naked eye 3D product is improved.)

1. The method for detecting the angle of the naked eye 3D grating film is characterized by comprising the following steps:

placing a workpiece to be detected on a transparent workbench, wherein the workpiece to be detected comprises cover plate glass and a grating film attached above the cover plate glass;

irradiating the workpiece to be measured by adopting a light source component arranged below the transparent workbench to form a light band to be measured;

acquiring parameters by adopting a machine vision system arranged above the transparent workbench, and acquiring light band coordinate parameters corresponding to the light band to be detected and glass coordinate parameters corresponding to the cover plate glass;

calculating the actual measurement angle between the grating film and the cover plate glass according to the light band coordinate parameter and the glass coordinate parameter; if the actual measurement angle is within the standard angle range, obtaining a detection result which is qualified in detection; and if the actual measurement angle is not in the standard angle range, acquiring a detection result which is unqualified in detection.

2. The method for detecting the angle of the naked eye 3D grating film according to claim 1, wherein the light source assembly is a point light source assembly.

3. The method for detecting the angle of the naked eye 3D grating film according to claim 1, wherein the step of calculating the measured angle between the grating film and the cover glass according to the optical band coordinate parameter and the glass coordinate parameter comprises;

acquiring a light band slope based on the light band coordinate parameter;

acquiring an edge slope based on the glass coordinate parameter, wherein the edge slope is a slope corresponding to an edge where the cover glass and the light band to be detected intersect;

and determining the actually measured angle between the grating film and the cover plate glass based on the light band slope and the edge slope.

4. The method for detecting the angle of the naked eye 3D grating film according to claim 2, wherein the method further comprises:

detecting the light source brightness of the point light source component by adopting an induction component connected with the machine vision system, and sending the light source brightness to the machine vision system;

and the machine vision system receives the light source brightness, and when the light source brightness is within a standard light source range, parameter acquisition is carried out.

5. The method for detecting the angle of the naked eye 3D grating film according to claim 4, wherein the sensing component is used for detecting the ambient brightness corresponding to the current environment and the optical band brightness corresponding to the optical band to be detected, and sending the ambient brightness and the optical band brightness to the machine vision system;

and the machine vision system receives the environment brightness and the light band brightness, and when the contrast of the environment brightness and the light band brightness is greater than a preset contrast, the machine vision system acquires the light band coordinate parameter corresponding to the light band to be detected and the glass coordinate parameter corresponding to the cover glass.

6. The utility model provides a detection system of bore hole 3D grating film angle which characterized in that includes:

the transparent workbench is used for placing a workpiece to be detected, and the workpiece to be detected comprises cover plate glass and a grating film attached to the upper part of the cover plate glass;

the light source assembly is arranged below the transparent workbench and used for irradiating the workpiece to be detected to form a light band to be detected;

the machine vision system is arranged above the transparent workbench and used for acquiring parameters and acquiring a light band coordinate parameter corresponding to the light band to be detected and a glass coordinate parameter corresponding to the cover plate glass;

calculating the actual measurement angle between the grating film and the cover plate glass according to the light band coordinate parameter and the glass coordinate parameter; if the actual measurement angle is within the standard angle range, obtaining a detection result which is qualified in detection; and if the actual measurement angle is not in the standard angle range, acquiring a detection result which is unqualified in detection.

7. The system for detecting the angle of the naked eye 3D grating film according to claim 6, wherein the light source component is a point light source component.

8. The system for detecting the angle of the naked eye 3D grating film according to claim 6, wherein the calculating the measured angle between the grating film and the cover glass according to the optical band coordinate parameter and the glass coordinate parameter comprises;

acquiring a light band slope based on the light band coordinate parameter;

acquiring an edge slope based on the glass coordinate parameter, wherein the edge slope is a slope corresponding to an edge where the cover glass and the light band to be detected intersect;

and determining the actually measured angle between the grating film and the cover plate glass based on the light band slope and the edge slope.

9. The system for detecting the angle of the naked eye 3D grating film according to claim 7, wherein the system for detecting the angle of the naked eye 3D grating film further comprises an induction component;

the sensing assembly is connected with the machine vision system and used for detecting the light source brightness of the point light source assembly and sending the light source brightness to the machine vision system;

and the machine vision system receives the light source brightness and acquires parameters when the light source brightness is within a standard brightness range.

10. The system for detecting the angle of the naked eye 3D grating film according to claim 9, wherein the sensing component is further configured to detect an ambient brightness corresponding to a current environment and an optical band brightness corresponding to the optical band to be detected, and send the ambient brightness and the optical band brightness to the machine vision system;

and the machine vision system receives the environment brightness and the light band brightness, and when the contrast of the environment brightness and the light band brightness is greater than a preset contrast, the machine vision system acquires the light band coordinate parameter corresponding to the light band to be detected and the glass coordinate parameter corresponding to the cover glass.

Technical Field

The invention relates to the technical field of naked eye 3D equipment, in particular to a system and a method for detecting an angle of a naked eye 3D grating film.

Background

The definition of a naked eye 3D display screen and the image quality of a stereoscopic image depend on whether a grating film (lenticular lens) on the surface of the screen and pixels of a liquid crystal panel are accurately aligned according to design parameters.

When naked eye 3D display products are produced: attaching the grating film to cover plate glass at a preset angle (namely design parameters), and then attaching a liquid crystal panel to form a semi-finished product; when the actual angle between the grating film and the cover plate glass meets the precision requirement, the definition of the naked eye 3D display screen and the image quality of the stereoscopic image can be ensured to be better. If the actual angle deviation is too large, after the liquid crystal panel is attached, the accumulated error exceeds the precision requirement of alignment, the image quality of the produced naked eye 3D display module is fuzzy, and the stereoscopic impression of the image is influenced.

At present, when the naked eye 3D grating film angle is detected, grating film angle detection can only be carried out on a semi-finished product attached with a liquid crystal panel or a finished product of an assembled backlight module, when an unqualified product is detected, the semi-finished product attached with the liquid crystal panel or the finished product of the assembled backlight module needs to be disassembled, the assembly time is long, the naked eye 3D module assembly efficiency is low, and the naked eye 3D module is not beneficial to mass production of naked eye 3D modules.

Disclosure of Invention

The embodiment of the invention provides a system and a method for detecting the angle of a naked eye 3D grating film, which aim to solve the problem that the angle of the grating film can only be detected on a semi-finished product which is attached with a liquid crystal panel or a finished product which is assembled with a backlight module in the prior art.

On the one hand, the method comprises the following steps of,

the embodiment of the invention provides a method for detecting an angle of a naked eye 3D grating film, which comprises the following steps:

placing a workpiece to be detected on a transparent workbench, wherein the workpiece to be detected comprises cover plate glass and a grating film attached above the cover plate glass;

irradiating the workpiece to be measured by adopting a light source component arranged below the transparent workbench to form a light band to be measured;

acquiring parameters by adopting a machine vision system arranged above the transparent workbench, and acquiring light band coordinate parameters corresponding to the light band to be detected and glass coordinate parameters corresponding to the cover plate glass;

calculating the actual measurement angle between the grating film and the cover plate glass according to the light band coordinate parameter and the glass coordinate parameter; if the actual measurement angle is within the standard angle range, obtaining a detection result which is qualified in detection; and if the actual measurement angle is not in the standard angle range, acquiring a detection result which is unqualified in detection.

Preferably, the light source assembly is a point light source assembly.

Preferably, the calculating the actually measured angle between the grating film and the cover plate glass according to the light band coordinate parameter and the glass coordinate parameter includes;

acquiring a light band slope based on the light band coordinate parameter;

acquiring an edge slope based on the glass coordinate parameter, wherein the edge slope is a slope corresponding to an edge where the cover glass and the light band to be detected intersect;

and determining the actually measured angle between the grating film and the cover plate glass based on the light band slope and the edge slope.

Preferably, the detection method further comprises:

detecting the light source brightness of the point light source component by adopting an induction component connected with the machine vision system, and sending the light source brightness to the machine vision system;

and the machine vision system receives the light source brightness, and when the light source brightness is within a standard light source range, parameter acquisition is carried out.

Preferably, the sensing assembly is adopted to detect the environment brightness corresponding to the current environment and the light band brightness corresponding to the light band to be detected, and the environment brightness and the light band brightness are sent to the machine vision system;

and the machine vision system receives the environment brightness and the light band brightness, and when the contrast of the environment brightness and the light band brightness is greater than a preset contrast, the machine vision system acquires the light band coordinate parameter corresponding to the light band to be detected and the glass coordinate parameter corresponding to the cover glass.

The embodiment of the invention provides a system for detecting the angle of a naked eye 3D grating film, which comprises:

the transparent workbench is used for placing a workpiece to be detected, and the workpiece to be detected comprises cover plate glass and a grating film attached to the upper part of the cover plate glass;

the light source assembly is arranged below the transparent workbench and used for irradiating the workpiece to be detected to form a light band to be detected;

the machine vision system is arranged above the transparent workbench and used for acquiring parameters and acquiring a light band coordinate parameter corresponding to the light band to be detected and a glass coordinate parameter corresponding to the cover plate glass;

calculating the actual measurement angle between the grating film and the cover plate glass according to the light band coordinate parameter and the glass coordinate parameter; if the actual measurement angle is within the standard angle range, obtaining a detection result which is qualified in detection; and if the actual measurement angle is not in the standard angle range, acquiring a detection result which is unqualified in detection.

Preferably, the light source assembly is a point light source assembly.

Preferably, the calculating the actually measured angle between the grating film and the cover plate glass according to the light band coordinate parameter and the glass coordinate parameter includes;

acquiring a light band slope based on the light band coordinate parameter;

acquiring an edge slope based on the glass coordinate parameter, wherein the edge slope is a slope corresponding to an edge where the cover glass and the light band to be detected intersect;

and determining the actually measured angle between the grating film and the cover plate glass based on the light band slope and the edge slope.

Preferably, the detection system for the angle of the naked eye 3D grating film further comprises an induction component;

the sensing assembly is connected with the machine vision system and used for detecting the light source brightness of the point light source assembly and sending the light source brightness to the machine vision system;

and the machine vision system receives the light source brightness and acquires parameters when the light source brightness is within a standard brightness range.

Preferably, the sensing component is further configured to detect an ambient brightness corresponding to a current environment and an optical band brightness corresponding to the optical band to be detected, and send the ambient brightness and the optical band brightness to the machine vision system;

and the machine vision system receives the environment brightness and the light band brightness, and when the contrast of the environment brightness and the light band brightness is greater than a preset contrast, the machine vision system acquires the light band coordinate parameter corresponding to the light band to be detected and the glass coordinate parameter corresponding to the cover glass.

The embodiment of the invention provides a method and a system for detecting the angle of a naked eye 3D grating film, wherein in the detection method, a light source component is arranged below a transparent workbench, and a light source emitted by the light source component penetrates through the transparent workbench and a cover plate glass to irradiate the grating film above the cover plate glass so as to form a light band to be detected; at the moment, a machine vision system is adopted to detect the light band coordinate of the light band to be detected and the glass coordinate parameter of the cover plate glass, so that the included angle between the light band to be detected and the cover plate glass, namely the actual measurement angle between the light band to be detected and the cover plate glass can be obtained; and when the actual measurement angle is within the standard angle range, the detection result of the workpiece to be detected is qualified, otherwise, the detection result of the workpiece to be detected is unqualified. The detection method of the embodiment can determine whether the actual measurement angle of the grating film attached to the cover plate glass is within the standard angle range or not before the display screen is assembled, the detection steps are simple, the assembly process of naked eye 3D products can be effectively optimized, the assembly efficiency of the naked eye 3D products is improved, and automatic detection of the naked eye 3D grating film angle can be realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a system for detecting an angle of a naked-eye 3D grating film in an embodiment of the present invention;

FIG. 2 is a flowchart of a method for detecting an angle of a naked eye 3D grating film according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an actual measurement angle between a naked eye 3D grating film and cover glass in an embodiment of the present disclosure;

fig. 4 is another flowchart of a method for detecting an angle of a naked eye 3D grating film according to an embodiment of the present invention;

fig. 5 is another flowchart of a method for detecting an angle of a naked-eye 3D grating film according to an embodiment of the present invention;

fig. 6 is another flowchart of a method for detecting an angle of a naked eye 3D grating film according to an embodiment of the present invention;

description of the drawings:

10. a workpiece to be tested; 11. cover plate glass; 12. a grating film; 20. a light source assembly; 30. a machine vision system; 40. the light band to be measured.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a method for detecting an angle of a naked eye 3D grating film, which is applied to a system for detecting an angle of a naked eye 3D grating film shown in figure 1 and used for detecting whether the angle of the grating film 12 attached to cover plate glass 11 is qualified or not before a display screen is assembled on a naked eye 3D product, the detection steps are simple, the assembly process of the naked eye 3D product can be effectively optimized, the assembly efficiency of the naked eye 3D product is improved, and the problem of low assembly efficiency of a naked eye 3D module is solved, as shown in figure 2, the method for detecting the angle of the naked eye 3D grating film comprises the following steps:

s201: and placing a workpiece to be detected on the transparent workbench, wherein the workpiece to be detected comprises cover plate glass and a grating film attached above the cover plate glass.

S202: and irradiating the workpiece to be measured by adopting a light source component arranged below the transparent workbench to form a light band to be measured.

In this embodiment, transparent workstation (not shown) can guarantee that the light that light source subassembly 20 sent pierces through transparent workstation to shine workpiece 10 that awaits measuring, form the light band 40 that awaits measuring, it is follow-up only to gather the coordinate parameter between light band 40 and the cover plate glass 11 that awaits measuring, can obtain the actual measurement angle, consequently, can be before bore hole 3D product equipment display screen, whether the angle when detecting grating film 12 laminating cover plate glass 11 is qualified, simplify detection procedure and detection operation, improve detection efficiency.

S203: and acquiring parameters by adopting a machine vision system arranged above the transparent workbench to acquire light band coordinate parameters corresponding to the light band to be detected and glass coordinate parameters corresponding to the cover plate glass.

The light band coordinate parameter is a coordinate parameter formed by intersection of the light band 40 to be measured and the edge of the cover glass 11. Specifically, as shown in FIG. 3, the optical tape coordinate parameter is point L (x)_L，y_L) And a point R (x)_R，y_R) (ii) a The glass coordinate parameter refers to the coordinate parameter corresponding to the vertex of the cover glass, such as point A (x) in FIG. 3_A，y_A) And point D (x)_D，y_D) Or, point B (x)_B，y_B) And point C (x)_C，y_C)。

Understandably, the machine vision system 30 is adopted to collect parameters, so that the detection automation degree of the naked eye 3D grating film angle can be improved, and the detection efficiency can be effectively improved.

S204: calculating the actual measurement angle between the grating film and the cover plate glass according to the light band coordinate parameter and the glass coordinate parameter; if the actual measurement angle is within the standard angle range, obtaining a detection result which is qualified in detection; and if the actual measurement angle is not in the standard angle range, acquiring a detection result which is unqualified in detection.

The actually measured angle is an actual included angle between the grating film 12 and the cover glass 11. The standard angle range refers to a preset angle range. The detection result is the result obtained by detecting the workpiece 10 to be detected, and in this embodiment, when the actual measurement angle is within the standard angle range, the detection result is qualified; and when the actual measurement angle is not in the standard angle range, the detection result is unqualified.

In this embodiment, the light source assembly 20 is disposed below the transparent worktable, and a light source emitted by the light source assembly 20 penetrates through the transparent worktable and the cover glass 11 to irradiate the grating film 12 above the cover glass 11, so as to form a light band 40 to be measured; at this time, the machine vision system 30 is adopted to detect the light band coordinate of the light band 40 to be detected and the glass coordinate parameter of the cover glass 11, so that the included angle between the light band 40 to be detected and the cover glass 11, namely the actually measured angle between the light band 40 to be detected and the cover glass 11 can be obtained; and when the actual measurement angle is within the standard angle range, the detection result of the workpiece 10 to be detected is qualified, otherwise, the detection result of the workpiece 10 to be detected is unqualified. The detection method of the embodiment can determine whether the actual measurement angle of the grating film 12 attached to the cover plate glass 11 is within the standard angle range or not before the display screen is assembled, the detection steps are simple, the assembly process of naked eye 3D products can be effectively optimized, the assembly efficiency of the naked eye 3D products is improved, and the automatic detection of the naked eye 3D grating film angle can be realized.

Further, the machine vision system 30 is an XY axis machine vision system 30, the machine vision system 30 includes a lens, an X axis moving assembly and a Y axis moving assembly; the lens is arranged on the X-axis moving assembly and the Y-axis moving assembly to realize the movement of the lens along the X axis and the Y axis to obtain a glass coordinate parameter and a light band coordinate parameter.

According to the method for detecting the angle of the naked eye 3D grating film, the light source component 20 arranged below the transparent workbench is adopted to irradiate the workpiece 10 to be detected to form the light band 40 to be detected, the coordinate parameters between the light band 40 to be detected and the cover plate glass 11 are only required to be acquired subsequently, the actual measurement angle can be obtained, the detection steps and the detection operation are simplified, and the detection efficiency is improved. Acquiring parameters by using a machine vision system 30 arranged above the transparent workbench to acquire light band coordinate parameters corresponding to the light band 40 to be detected and glass coordinate parameters corresponding to the cover plate glass 11; according to the light band coordinate parameter and the glass coordinate parameter, the actual measurement angle of the grating film 12 and the cover plate glass 11 is calculated, whether the actual measurement angle when the grating film 12 is attached to the cover plate glass 11 is within a standard angle range or not can be determined before the display screen is assembled, the detection steps are simple, the assembly process of naked eye 3D products can be effectively optimized, the assembly efficiency of the naked eye 3D products is improved, and automatic detection of the naked eye 3D grating film angle can be realized.

As an example, the light source assembly is a point light source assembly. In this embodiment, the light source assembly 20 is a point light source assembly, and therefore, the light source emitted by the point light source assembly is refracted simultaneously on all cylindrical mirrors of the grating film 12, so that a single light band 40 to be measured can be formed, subsequent light band coordinates are ensured to have uniqueness, the accuracy of the measured angle is ensured, and technical support is provided for automatically detecting the measured angle.

As an example, as shown in fig. 4, in step S204, a measured angle between the grating film and the cover glass is calculated according to the optical tape coordinate parameter and the glass coordinate parameter, including;

s401: based on the optical band coordinate parameter, an optical band slope is obtained.

Wherein, the slope of the light band represents the inclination degree of the light band 40 to be measured relative to the horizontal axis in the coordinate system. In this embodiment, the light band coordinate parameter is used to determine the coordinates of two points where the light band 40 to be measured intersects with the cover glass 11, i.e. the point L (x) in fig. 2_L，y_L) And a point R (x)_R，y_R) According to the point L (x)_L，y_L) And a point R (x)_R，y_R) Determining slope of band, i.e. slope m of band_band is calculated by

S402: and acquiring an edge slope based on the glass coordinate parameter, wherein the edge slope is a slope corresponding to the edge where the cover glass and the light band to be detected intersect.

Wherein the side slope represents the inclination of the side of the cover glass 11 with respect to the horizontal axis of the coordinate system, and in the present embodiment, the side slope is the coverThe slope of one of the two sides of the glass sheet 11 intersecting the optical tape 40 to be measured. Specifically, taking the AD side of the cover glass 11 in FIG. 2 as an example, the point A (x) is obtained_A，y_A) And point D (x)_D，y_D) According to point A (x)_A，y_A) And point D (x)_D，y_D) Determining the edge slope, i.e. the edge slope m_ADIs calculated by the formula

Further, the bottom surface of the cover glass 11 is placed on the transparent workbench in this embodiment, the side surface of the cover glass 11 is a vertical surface, and part of light can be reflected on the vertical surface, so that the machine vision system 30 can clearly capture the contour of the cover glass 11, obtain accurate glass coordinate parameters of the cover glass 11, and ensure that the subsequent measured angle is accurate.

S403: and determining the actually measured angle between the grating film and the cover plate glass based on the slope of the light band and the slope of the edge.

In this embodiment, the calculation formula of the included angle between the edge AD and the light band to be measured isBecause each stripe of the grating film 12 is equivalent to a long and thin cylindrical mirror, the light source refracts on all cylindrical mirrors of the grating film 12 at the same time to form a light band to be measured, the angle of the light band to be measured and the included angle of the grating lines are 90 degrees, therefore, the grating lines and the light band to be measured are right angles, therefore, when the light band to be measured is used as a light bandWhen the measured angle is positive, the measured angle is as follows: phi is 90-theta; when in useWhen the angle is negative, the actual measurement angle is as follows: phi is theta-90 deg.

This embodiment, through light band slope and limit slope, can be before the equipment display screen, whether the actual measurement angle when confirming the laminating of grating film 12 apron glass 11 is in standard angle range, and detection procedure is simple, effectively improves detection efficiency.

The method for detecting the angle of the naked eye 3D grating film provided by the embodiment is based on the light band coordinate parameter to obtain the light band slope; acquiring an edge slope based on the glass coordinate parameter; based on the light band slope and the edge slope, the actual measurement angle between the grating film 12 and the cover plate glass 11 is determined, whether the actual measurement angle when the grating film 12 is attached to the cover plate glass 11 is within a standard angle range can be determined before the display screen is assembled, the detection steps are simple, and the detection efficiency is effectively improved.

As an example, as shown in fig. 5, the detection method further includes:

s501: and detecting the light source brightness of the light source component by adopting an induction component connected with the machine vision system, and sending the light source brightness to the machine vision system.

S502: and the machine vision system receives the brightness of the light source, and when the brightness of the light source is within the range of the standard light source, parameter acquisition is carried out.

The standard light source range is set according to the point light source components, namely, the standard light source ranges corresponding to different point light source components are different. For example, when the lighting assembly is an LED lamp, the standard light source range is between 1 watt and 2 watts.

In this embodiment, the sensing component is utilized to detect the light source brightness of the light source component 20, so as to ensure that when the light source brightness is within the standard brightness range, the machine vision system 30 can accurately capture the glass coordinate parameter of the cover glass 11 and the light band coordinate parameter of the light band 40 to be detected, ensure the feasibility of automatic detection, ensure the accuracy and definition of the coordinate parameters, and avoid errors.

Further, in order to ensure that the light emitted by the point light source assembly can be refracted on all cylindrical mirrors of the grating film 12 to form a clear and concentrated light band 40 to be detected, the actual light range of the point light source assembly and the light source brightness of the point light source assembly can be detected by using the sensing assembly, and the actual light range and the light source brightness are sent to the machine vision system 30; the machine vision system 30 receives the light source area and the light source brightness, and when the actual light range is within the standard light range and the light source brightness is within the standard brightness range, parameter acquisition is performed, so that the parameter coordinates are clear and accurate, and errors are avoided. The actual light range refers to a light radiation range emitted by the light source assembly 20, and if the light source assembly 20 is a parallel light source or the like, the light cannot be detected.

The method for detecting the angle of the naked eye 3D grating film provided by the embodiment adopts the sensing component connected with the machine vision system 30 to detect the light source brightness of the point light source component, and sends the light source brightness to the machine vision system 30, so that the detection automation degree is improved. The machine vision system 30 receives the light source brightness, and when the light source brightness is within the standard light source range, parameter acquisition is carried out, so that the machine vision system 30 can accurately capture the glass coordinate parameter of the cover glass 11 and the light band coordinate parameter of the light band 40 to be detected, the feasibility of automatic detection is ensured, the accuracy and the definition of the coordinate parameters are ensured, and errors are avoided.

As an example, as shown in fig. 6, the detection method further includes:

s601: and detecting the environment brightness corresponding to the current environment and the light band brightness corresponding to the light band to be detected by adopting the sensing assembly, and transmitting the environment brightness and the light band brightness to the machine vision system.

S602: and the machine vision system receives the ambient brightness and the light band brightness, and when the contrast of the ambient brightness and the light band brightness is greater than the preset contrast, the light band coordinate parameter corresponding to the light band to be detected and the glass coordinate parameter corresponding to the cover glass are obtained.

In this embodiment, when the contrast between the ambient brightness and the light band brightness is greater than the preset contrast, it can be ensured that the machine vision system 30 can clearly identify the coordinate parameters of the light band 40 to be detected and the cover glass 11, so as to ensure the precision of the coordinate parameters and avoid errors.

According to the method for detecting the angle of the naked eye 3D grating film, the sensing assembly is adopted to detect the environment brightness corresponding to the current environment and the light band brightness corresponding to the light band 40 to be detected, the environment brightness and the light band brightness are sent to the machine vision system 30, and the detection automation degree is improved. The machine vision system 30 receives the ambient brightness and the light band brightness, and when the contrast of the ambient brightness and the light band brightness is greater than the preset contrast, the light band coordinate parameter corresponding to the light band 40 to be detected and the glass coordinate parameter corresponding to the cover glass 11 are obtained, so that the machine vision system 30 can be ensured to clearly identify the coordinate parameters of the light band 40 to be detected and the cover glass 11, the precision of the coordinate parameters is ensured, and errors are avoided.

As shown in fig. 1, an embodiment of the present invention provides a system for detecting an angle of a naked-eye 3D grating film, including: the transparent workbench is used for placing a workpiece 10 to be detected, and the workpiece 10 to be detected comprises cover plate glass 11 and a grating film 12 attached above the cover plate glass 11; the light source assembly 20 is arranged below the transparent workbench and used for irradiating the workpiece 10 to be measured to form a light band 40 to be measured; the machine vision system 30 is arranged above the transparent workbench and used for acquiring parameters and acquiring light band coordinate parameters corresponding to the light band 40 to be detected and glass coordinate parameters corresponding to the cover plate glass 11; calculating the actual measurement angle between the grating film 12 and the cover glass 11 according to the light band coordinate parameter and the glass coordinate parameter; if the actual measurement angle is within the standard angle range, obtaining a detection result which is qualified in detection; and if the actual measurement angle is not in the standard angle range, acquiring a detection result which is unqualified in detection.

In this embodiment, the light source assembly 20 is disposed below the transparent worktable, and a light source emitted by the light source assembly 20 penetrates through the transparent worktable and the cover glass 11 to irradiate the grating film 12 above the cover glass 11, so as to form a light band 40 to be measured; at this time, the machine vision system 30 is adopted to detect the light band coordinate of the light band 40 to be detected and the glass coordinate parameter of the cover glass 11, so that the included angle between the light band 40 to be detected and the cover glass 11, namely the actually measured angle between the light band 40 to be detected and the cover glass 11 can be obtained; and when the actual measurement angle is within the standard angle range, the detection result of the workpiece 10 to be detected is qualified, otherwise, the detection result of the workpiece 10 to be detected is unqualified. The detection method of the embodiment can determine whether the actual measurement angle of the grating film 12 attached to the cover plate glass 11 is within the standard angle range or not before the display screen is assembled, the detection steps are simple, the assembly process of naked eye 3D products can be effectively optimized, the assembly efficiency of the naked eye 3D products is improved, and the automatic detection of the naked eye 3D grating film angle can be realized.

Further, the machine vision system 30 is an XY axis machine vision system 30, the machine vision system 30 includes a lens, an X axis moving assembly and a Y axis moving assembly; the lens is arranged on the X-axis moving assembly and the Y-axis moving assembly to realize the movement of the lens along the X axis and the Y axis to obtain a glass coordinate parameter and a light band coordinate parameter.

As an example, as shown in fig. 1, the light source assembly 20 is a point light source assembly. In this embodiment, the light source assembly 20 is a point light source assembly, and the light source emitted by the point light source assembly is refracted simultaneously on all cylindrical mirrors of the grating film 12, so that a single light band 40 to be measured can be formed, subsequent light band coordinates are ensured to have uniqueness, the accuracy of the measured actual measurement angle is ensured, and technical support is provided for automatically detecting the actual measurement angle.

As an example, according to the light band coordinate parameter and the glass coordinate parameter, calculating the measured angle between the grating film 12 and the cover glass 11, including; acquiring a light band slope based on the light band coordinate parameter; based on the glass coordinate parameters, obtaining edge slope, wherein the edge slope is the slope corresponding to the edge where the cover glass 11 and the light band 40 to be detected intersect; and determining the actually measured angle between the grating film 12 and the cover glass 11 based on the slope of the light band and the slope of the edge.

In the present embodiment, as shown in fig. 3, the light band coordinate parameter is the coordinates of two points where the light band to be measured intersects with the cover glass 11, i.e. the point L (x) in fig. 2_L，y_L) And a point R (x)_R，y_R) According to the point L (x)_L，y_L) And a point R (x)_R，y_R) Determining slope of band, i.e. slope m of band_bandIs calculated by the formulaAnd measuring the slope of one of the two sides of the cover glass 11 intersecting the light band to be measured, taking the AD side of the cover glass 11 in FIG. 2 as an example, to obtain a point A (x)_A，y_A) And point D (x)_D，y_D) According to point A (x)_A，y_A) And point D (x)_D，y_D) Determining the edge slope, i.e. the edge slope m_ADIs calculated by the formulaAt the moment, the calculation formula of the included angle between the side AD and the light band to be measured isThe grating lines are perpendicular to the light band to be measuredWhen the number is positive, the angle of the grating lines is as follows:when in useWhen the angle is negative, the actual measurement angle is as follows: phi is theta-90 deg. This embodiment, through light band slope and limit slope, can be before the equipment display screen, whether the actual measurement angle when confirming the laminating of grating film 12 apron glass 11 is in standard angle range, and detection procedure is simple, effectively improves detection efficiency.

As an example, the detection system for the angle of the naked eye 3D grating film further comprises a sensing assembly; the sensing assembly is connected with the machine vision system 30 and used for detecting the light source brightness of the point light source assembly and sending the light source brightness to the machine vision system 30; the machine vision system 30 receives the light source brightness and performs parameter acquisition when the light source brightness is within the standard brightness range.

In this embodiment, the sensing component is utilized to detect the light source brightness of the light source component 20, so as to ensure that when the light source brightness is within the standard brightness range, the machine vision system 30 can accurately capture the glass coordinate parameter of the cover glass 11 and the light band coordinate parameter of the light band 40 to be detected, ensure the feasibility of automatic detection, ensure the accuracy and definition of the coordinate parameters, and avoid errors.

Further, the bottom surface of cover glass 11 in this embodiment is placed on transparent work, and the side of cover glass 11 is the vertical, and partial light can be reflected on the vertical, so machine vision system 30 can clearly catch the profile of cover glass 11, obtains accurate cover glass 11's glass coordinate parameter, ensures that follow-up survey actual measurement angle is accurate, improves and detects degree of automation.

Further, in order to ensure that the light emitted by the point light source assembly can be refracted on all cylindrical mirrors of the grating film 12 to form a clear and concentrated light band 40 to be detected, the actual light range of the point light source assembly and the light source brightness of the point light source assembly can be detected by using the sensing assembly, and the actual light range and the light source brightness are sent to the machine vision system 30; the machine vision system 30 receives the light source area and the light source brightness, and when the actual light range is within the standard light range and the light source brightness is within the standard brightness range, parameter acquisition is performed, so that the parameter coordinates are clear and accurate, and errors are avoided. The actual light range refers to a light radiation range emitted by the light source assembly 20, and if the light source assembly 20 is a parallel light source or the like, the light cannot be detected.

As an example, the sensing component is further configured to detect an ambient brightness corresponding to the current environment and a light band brightness corresponding to the light band 40 to be measured, and transmit the ambient brightness and the light band brightness to the machine vision system 30;

the machine vision system 30 receives the ambient brightness and the light band brightness, and when the contrast of the ambient brightness and the light band brightness is greater than the preset contrast, obtains the light band coordinate parameter corresponding to the light band 40 to be measured and the glass coordinate parameter corresponding to the cover glass 11.

In this embodiment, when the contrast between the ambient brightness and the light band brightness is greater than the preset contrast, it can be ensured that the machine vision system 30 can clearly identify the coordinate parameters of the light band 40 to be detected and the cover glass 11, so as to ensure the precision of the coordinate parameters and avoid errors.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.