CN115164684A - Screen curvature detection device and screen curvature detection method - Google Patents

Abstract

The present application provides a screen curvature detection device and a screen curvature detection method. Since a plurality of contact bodies move towards the screen to be detected at the same time, compared with the method of laser scanning along the screen, the contact body is used to contact the to-be-detected screen. The time required for the screen is shorter, which improves the detection efficiency of screen curvature. When a larger size screen needs to be detected, a plurality of screen curvature detection devices can be assembled together; when the detection efficiency of multiple screens needs to be improved, a plurality of screen curvature detection devices can be made to detect a plurality of corresponding sizes respectively. Screen. Therefore, the size of the single screen curvature detection device can be reasonably controlled, the curvature detection efficiency of large-size screens can be improved, and the screens of different sizes can be adapted to improve the effective utilization and detection efficiency of the single screen curvature detection device.

Description

Screen curvature detection device and screen curvature detection method

technical field

The application belongs to the technical field of screen detection, and in particular relates to a screen curvature detection device and a screen curvature detection method.

Background technique

During the manufacturing process of the display screen, the screen may be bent and deformed due to the influence of the environment. If it is shipped directly from the factory without inspection, it will affect the quality of the subsequent application products. In the prior art, the curvature of the screen is detected by optical technology, that is, by means of laser scanning, points are connected and lines are taken on the screen to form a surface, and a screen surface model is established. However, for a screen with a larger size, the time required for this laser scanning method is too long, which affects the detection efficiency.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a screen curvature detection device and a screen curvature detection method, so as to solve the problem of low efficiency in the existing screen curvature detection process.

In a first aspect, an embodiment of the present application provides a screen curvature detection device, including: a mounting seat;

A plurality of detection assemblies are mounted on the mounting base; each of the detection assemblies includes a driving device, a contact body and a braking sensor, and the driving device is used to drive the contact body to move toward or away from the mounting seat , the end of the contact body away from the mounting seat is used to contact the screen to be detected, and the braking sensor is used to detect the contact state between the contact body and the screen to be detected; the braking sensor detects the contact When the body contacts the screen to be detected, the driving device controls the contact body to stop moving.

Optionally, the driving device includes an electromagnetic driving device.

Optionally, the brake sensor includes a force sensor, and the force sensor is used to detect the contact force between the contact body and the screen to be detected; when the current detection value of the force sensor is greater than or equal to a preset value, the The driving device controls the contact body to stop moving.

Optionally, the preset value is set to be 0.1 kgf to 0.2 kgf.

Optionally, the radial dimension of the contact body is set to be 1 mm to 5 mm.

Optionally, the distance between two adjacent contact bodies is set to be 1 mm to 10 mm.

Optionally, an end surface of the contact body at one end away from the mounting seat is a convex arc surface.

Optionally, the detection component further includes a displacement sensor, and the displacement sensor is used to detect the movement and displacement of the contact body after the contact body contacts the screen to be detected.

In a second aspect, an embodiment of the present application further provides a method for detecting the curvature of a screen, and the method for detecting the curvature of a screen includes the following steps:

provide multiple contacts;

controlling each of the contact bodies to move toward the screen to be detected;

Determine that each of the contact bodies is in contact with the screen to be detected, and control each of the contact bodies to stop moving;

A curved surface model of the screen to be detected is established by using the relative positions of the contact ends of the plurality of contact bodies.

Optionally, the step of determining that each of the contact bodies is in contact with the screen to be detected, and controlling each of the contact bodies to stop moving includes:

Obtain the current axial bearing force of each of the contact bodies;

It is determined that the current axial bearing force of each of the contact bodies is greater than or equal to a preset value, and each of the contact bodies is controlled to stop moving.

Optionally, the step of using the relative positions of the contact ends of the plurality of contact bodies to establish a curved surface model of the screen to be detected includes:

Obtain the relative position and motion displacement of each of the contact bodies;

A curved surface model of the screen to be detected is established by using the relative positions and motion displacements of the contact bodies.

The screen curvature detection device provided by the embodiment of the present application controls the contact bodies to stop when each contact body touches the screen to be detected by moving a plurality of contact bodies towards the screen to be detected at the same time. In this way, after each contact body touches the screen The relative position data can be transmitted to the computer, and then the computer must establish a curved model of the screen to be detected by using the position of the contact end of the contact body, so that the curved surface of the screen can be obtained more intuitively and quickly through the curved model. Since multiple contact bodies move towards the screen to be detected at the same time, compared with the way of laser scanning along the screen, the time required for the contact body to contact the screen to be detected is shorter, thereby improving the detection of the curvature of the screen efficiency. When it is necessary to detect a larger size screen, multiple screen curvature detection devices can be assembled together; when the detection efficiency of multiple screens needs to be improved, multiple screen curvature detection devices can be made to detect a plurality of corresponding sizes respectively. Screen. Therefore, the size of the single screen curvature detection device can be reasonably controlled, the curvature detection efficiency of large-size screens can be improved, and the screens of different sizes can be adapted to improve the effective utilization and detection efficiency of the single screen curvature detection device.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

For a more complete understanding of the present application and its beneficial effects, the following description will be made with reference to the accompanying drawings. Here, the same reference numerals denote the same parts in the following description.

FIG. 1 is a schematic structural diagram of a screen curvature detection apparatus provided by an embodiment of the present application.

FIG. 2 is a schematic projection diagram of a screen curvature detection device provided by an embodiment of the present application.

FIG. 3 is a schematic cross-sectional view of a screen curvature detection device provided by an embodiment of the present application.

FIG. 4 is a partial enlarged view of A in FIG. 3 .

FIG. 5 is a schematic cross-sectional view of a contact body in an embodiment of the present application.

FIG. 6 is a schematic flowchart of a method for detecting the curvature of a screen according to an embodiment of the present application.

FIG. 7 is a detailed flowchart of a method for detecting the curvature of a screen according to an embodiment of the present application.

FIG. 8 is a detailed flowchart of a method for detecting the curvature of a screen provided by an embodiment of the present application.

10. Mounting base; 20. Detection component; 21. Driving device; 22. Contact body; 23. Brake sensor; 24. Displacement sensor; 30. Screen to be detected.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

During the manufacturing process of the display screen, the screen may be bent and deformed due to the influence of the environment. If it is shipped directly from the factory without inspection, it will affect the quality of the subsequent application products. In the prior art, the curvature of the screen is detected by optical technology, that is, by means of laser scanning, points are connected and lines are taken on the screen to form a surface, and a screen surface model is established. However, for a screen with a larger size, the time required for this laser scanning method is too long, which affects the detection efficiency.

The embodiments of the present application provide a screen curvature detection method of a screen curvature detection device, so as to solve the problem of low efficiency in the existing screen curvature detection process. It will be described below with reference to the accompanying drawings.

For example, please refer to FIG. 1 to FIG. 4 . FIG. 1 is a schematic structural diagram of a screen curvature detection apparatus provided by an embodiment of the present application. FIG. 2 is a schematic projection diagram of a screen curvature detection device provided by an embodiment of the present application. FIG. 3 is a schematic cross-sectional view of a screen curvature detection device provided by an embodiment of the present application. FIG. 4 is a partial enlarged view of A in FIG. 3 .

The screen curvature detection device includes: an installation seat 10; a plurality of detection components 20 are installed on the installation seat 10; each detection component 20 includes a driving device 21, a contact body 22 and a braking sensor 23, the driving device 21 is used to drive the contact body 22 to move toward or away from the mounting seat 10 , the end of the contact body 22 away from the mounting seat 10 is used to contact the screen 30 to be detected, the brake sensor 23 It is used to detect the contact state between the contact body 22 and the screen to be detected 30 ; when the brake sensor 23 detects that the contact body 22 contacts the screen to be detected 30 , the driving device 21 controls the contact body 22 to stop moving .

In this embodiment, specifically, the mounting seat 10 can be in the shape of a cuboid or a disk, which is not limited here; in order to correspond to the shape of the screen and to facilitate the splicing and assembly of multiple screen curvature detection devices, The mounting seat 10 can be provided in the shape of a rectangular parallelepiped. The mounting base 10 may have a plurality of mounting holes arranged in a matrix, and a plurality of detection assemblies 20 are respectively mounted in each mounting hole, so as to hide and protect the driving device 21 and the brake sensor 23 . The contact body 22 can be in the shape of a rod, a cone or a block; the contact body 22 in the shape of a rod can be in the shape of a cylinder or a square column, which is not limited here.

In the non-detection state, the plurality of contact bodies 22 stay at the position closest to the mounting base 10 , and the contact ends of the plurality of contact bodies 22 are flush in the axial direction. In the detection state, the screen 30 to be detected is placed at a position opposite to the contact end of the contact body 22 , the driving device 21 of each detection component 20 drives each contact body 22 to move toward the screen to be detected 30 , and the contact body 22 contacts the screen to be detected 30 , the braking sensor 23 will detect the contact state and send a braking signal to the driving device 21 , so that the driving device 21 will control the contact body 22 to stop so as to keep the contact body 22 in contact with the screen 30 to be detected. After the contact body 22 stops, the positional relationship of the contact ends of the plurality of contact bodies 22 can be detected by the position detection device, including the radial distance and the axial distance between the two adjacent contact ends, and the position of the contact ends of the plurality of contact bodies 22 can be uploaded to After the computer is used, the coordinate models of a plurality of contact ends can be established, and then the point models of two adjacent contact ends can be connected by a simulated curve to establish a curved surface model of the screen 30 to be detected. After the surface model is established, the surface degree of the surface model, that is, the surface degree of the screen 30 to be detected, can be measured intuitively and quickly through computer software.

A plurality of contact bodies 22 can be distributed in a matrix, so that the radial distance between two adjacent contact ends is fixed, so the radial distance can be stored in the calculation software in advance, that is, after the contact bodies 22 stay, the actual need to detect is The axial relative position relationship of each contact end can reduce the detection objects and improve the modeling efficiency.

In the screen curvature detection device provided by the embodiment of the present application, by moving a plurality of contact bodies 22 toward the screen to be detected 30 at the same time, each contact body 22 is controlled to stop when each contact body 22 touches the screen to be detected 30 . In this way, each contact body 22 stops. The relative position data of the body 22 after contacting the screen can be transmitted to the computer, and then the computer must establish a curved surface model of the screen 30 to be detected by using the position of the contact end of the contact body 22, so that the curved surface model can be used to obtain the screen more intuitively and quickly. degree of surface. Since the plurality of contact bodies 22 move toward the screen to be detected 30 at the same time, compared with the way of laser scanning along the screen, the time required for the contact body 22 to contact the screen to be detected 30 is shorter, thereby improving the accuracy of the screen. Surface detection efficiency. When it is necessary to detect a larger size screen, multiple screen curvature detection devices can be assembled together; when the detection efficiency of multiple screens needs to be improved, multiple screen curvature detection devices can be made to detect a plurality of corresponding sizes respectively. Screen. Therefore, the size of the single screen curvature detection device can be reasonably controlled, the curvature detection efficiency of large-size screens can be improved, and the screens of different sizes can be adapted to improve the effective utilization and detection efficiency of the single screen curvature detection device.

The driving device 21 may be a hydraulic driving device 21 or a linear motor. Exemplarily, the driving device 21 includes an electromagnetic driving device 21, and the electromagnetic driving device 21 drives the contact body 22 through magnetic force. After the screen 30 to be detected, without increasing the power of the electromagnetic driving device 21, the driving device 21 continues to push the screen 30 to be detected to cause crushing damage, thereby improving the screen protection effect during the curvature detection process.

The brake sensor 23 may be a position sensor or a force sensor, which is not limited herein. Taking the position sensor as an example, the position sensor is used to detect the distance between the contact body 22 and the screen 30 to be detected. When the distance is zero, the position sensor will send a braking signal to the driving device 21, so that the driving device 21 controls the contact body 22 to stop. Down.

Exemplarily, the brake sensor 23 includes a force sensor, and the force sensor is used to detect the contact force between the contact body 22 and the screen 30 to be detected; the current detection value of the force sensor is greater than or equal to a preset value. , the driving device 21 controls the contact body 22 to stop moving. When the contact force between the contact body 22 and the screen 30 to be detected is greater than the preset value, it means that the contact body 22 has effectively contacted the screen 30 to be detected. At this time, the force sensor will send a braking signal to the driving device 21 to make the driving device 21 The control contact 22 stops. Compared with the position sensor, the contact state between the contact body 22 and the screen 30 to be detected is detected by the force sensor, which can ensure that the force sensor sends a braking signal after the contact body 22 and the screen to be detected 30 are effectively in contact, so that the contact body 22. The stop position of the contact end more truly reflects the position of the contacted screen part, so that the detection result of the screen curvature detection device is more real and reliable.

Specifically, the preset value is set to 0.1 kgf to 0.2 kgf, such as 0.1 kgf, 0.11 kgf, 0.12 kgf, 0.13 kgf, 0.14 kgf, 0.15 kgf, 0.16 kgf, 0.17 kgf , 0.18 kgf, 0.19 kgf, or 0.2 kgf. If the preset value is less than 0.1 kgf, the precision of the force sensor is required to be high, which increases the overall cost of the screen curvature detection device; if the preset value is greater than 0.2 kgf, a larger pressure may be formed on the screen damage to the screen; therefore, setting the preset value to 0.1 kgf to 0.2 kgf can not only improve the protection effect of the screen 30 to be detected, but also reasonably control the production cost of the screen curvature detection device.

Exemplarily, the radial dimension of the contact body 22 is set to be 1 mm to 5 mm, for example, it may be 1 mm, 2 mm, 3 mm, 4 mm or 5 mm. The contact body 22 is cylindrical. If the radial dimension of the contact body 22 is less than 1 mm, the pressure caused by the screen 30 to be detected during contact is relatively large, and the screen is easily damaged; if the radial dimension of the contact body 22 is greater than 5 mm, the modeling Therefore, setting the radial size of the contact body 22 to 1mm to 5mm can not only improve the detection effect of the screen curvature detection device, but also effectively protect the screen 30 to be detected.

Exemplarily, the distance between two adjacent contact bodies 22 is set to be 1 mm to 10 mm, for example, it may be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. If the distance between two adjacent contact bodies 22 is greater than 10 mm, the distribution density of the plurality of contact bodies 22 is small, and the curved surface formed by the points taken by the contact bodies 22 on the screen 30 to be detected cannot truly reflect the shape of the screen. Affects detection reliability; if the distance between two adjacent contact bodies 22 is less than 1mm, the contact bodies 22 are likely to interfere with each other during the movement process, affecting detection efficiency; therefore, the distance between two adjacent contact bodies 22 is set to 1mm to 10mm , which can not only improve the reliability of the detection results of the screen curvature detection device, but also improve the detection efficiency.

One end of the contact body 22 away from the mounting base 10 is the contact end, and the end surface of the contact end may be a plane surface or an arc surface, which is not limited herein. Exemplarily, as shown in FIG. 5 , FIG. 5 is a schematic flowchart of a method for detecting the curvature of a screen provided by an embodiment of the present application. The end face of the contact body 22 away from the mounting seat 10 is a convex arc surface, so that the edge of the plane can be prevented from scratching the screen 30 to be tested, thereby improving the screen protection effect during the testing process. Specifically, the contact body 22 can be configured as a plastic rod, which can be made of Teflon material. The hardness of the plastic rod is small, which can prevent the screen 30 to be tested from being bumped or scratched during the contact process; and the elasticity of the plastic rod is also small, which can avoid the elastic deformation of the contact end after touching the screen, so as to reduce the impact of elastic deformation on the contact end shaft. impact on position detection.

After the contact body 22 contacts the screen 30 to be tested, the axial position of the contact end can be measured by the dimension detection workpiece. For example, after the contact body 22 stops, the distance between the contact end of each contact body 22 and the mounting seat 10 is respectively measured to obtain Reflects the axial positional relationship of multiple contact ends.

Exemplarily, the detection assembly 20 further includes a displacement sensor 24, and the displacement sensor 24 is used to detect the movement and displacement of the contact body 22 after the contact body 22 contacts the screen 30 to be detected. The displacement sensor 24 can be installed at one end of the contact body 22 away from the screen 30 to be detected, so that it can move together with the contact body 22 . After the contact body 22 stops moving, the displacement of the displacement sensor 24 is the displacement of the contact body 22 . When the contact body 22 is in the initial position, the contact ends of the plurality of contact bodies 22 can be flush with each other, so that after the contact body 22 stops at the contact position, the displacement difference of the plurality of contact bodies 22 is the difference between the axial positions of the plurality of contact ends. Therefore, a curved surface model of the screen 30 to be detected can be effectively established by using the actual displacements of the plurality of contact bodies 22 . By arranging the displacement sensor 24, it is not necessary to measure the axial distance between the contact ends after the contact body 22 stops, thereby further improving the detection efficiency of the screen curvature detection device.

For example, please refer to FIG. 6 , which is a schematic flowchart of a method for detecting the curvature of a screen according to an embodiment of the present application. The embodiment of the present application also provides a method for detecting the curvature of a screen, the method comprising:

S100, providing a plurality of contact bodies 22;

S200, controlling each of the contact bodies 22 to move toward the screen 30 to be detected;

S300, determining that each of the contact bodies 22 is in contact with the screen to be detected 30, and controlling each of the contact bodies 22 to stop moving;

S400 , establishing a curved surface model of the screen 30 to be detected by using the relative positions of the contact ends of the plurality of contact bodies 22 .

In this embodiment, specifically, referring to the above-mentioned embodiment of the screen curvature detection device, it can be known that a plurality of contact bodies 22 can be mounted on one or more mounting bases 10, and the plurality of contact bodies 22 can be distributed in a matrix. A driving device 21 can be installed in the mounting base 10, and the driving device 21 is used to drive the contact body 22 to approach or move away from the screen 30 to be detected; therefore, by controlling the operation of the driving device 21, each of the contact bodies 22 can be controlled to move toward the screen 30 to be detected . After the contact body 22 contacts the screen 30 to be detected, the driving device 21 controls the contact body 22 to stop moving, so that the contact end of the contact body 22 can stay at the position in contact with the screen to be detected 30 .

After the contact body 22 stops, the positional relationship of the contact ends of the plurality of contact bodies 22 can be detected by the position detection device, including the radial distance and the axial distance between the two adjacent contact ends, and the position of the contact ends of the plurality of contact bodies 22 can be uploaded to After the computer is used, the coordinate models of a plurality of contact ends can be established, and then the point models of two adjacent contact ends can be connected by a simulated curve to establish a curved surface model of the screen 30 to be detected. After the surface model is established, the surface degree of the surface model, that is, the surface degree of the screen 30 to be detected, can be measured intuitively and quickly through computer software.

Since the radial distance between the two adjacent contact ends is fixed, the radial distance can be stored in the calculation software in advance, that is, after the contact body 22 stays, what actually needs to be detected is the axial relative positional relationship of each contact end. In this way, detection objects can be reduced to improve modeling efficiency.

The contact state between the touch panel and the screen to be detected 30 can be detected and judged by a position sensor, or can be detected and judged by a force sensor. Taking the position sensor as an example, the position sensor is used to detect the distance between the contact body 22 and the screen 30 to be detected. When the distance is zero, the position sensor will send a braking signal to the driving device 21, so that the driving device 21 controls the contact body 22 to stop. Down.

For example, please refer to FIG. 7 , which is a detailed flowchart of a method for detecting the curvature of a screen provided by an embodiment of the present application. The step of determining that each of the contact bodies 22 is in contact with the screen 30 to be detected, and controlling each of the contact bodies 22 to stop moving includes:

S310, obtaining the current axial bearing force of each of the contact bodies 22;

S320. Determine that the current axial bearing force of each of the contact bodies 22 is greater than or equal to a preset value, and control each of the contact bodies 22 to stop moving.

The current axial bearing force of the contact body 22 can be detected by the force sensor. When the contact force between the contact body 22 and the screen 30 to be detected is greater than the preset value, it means that the contact body 22 has effectively contacted the screen 30 to be detected. At this time, the force sensor will send a braking signal to the driving device 21 to make the driving device 21 The control contact 22 stops. Compared with the method of detecting the distance between the contact body 22 and the screen to be detected 30, the contact state between the contact body 22 and the screen to be detected 30 is detected by the force sensor, which can ensure that the force sensor is between the contact body 22 and the screen to be detected 30. The braking signal is issued only after effective contact, so that the stop position of the contact end of the contact body 22 more truly reflects the position of the contacted screen part, so that the detection result of the screen curvature detection device is more real and reliable.

After the contact body 22 contacts the screen 30 to be tested, the axial position of the contact end can be measured by the dimension detection workpiece. For example, after the contact body 22 stops, the distance between the contact end of each contact body 22 and the mounting seat 10 is respectively measured to obtain Reflects the axial positional relationship of multiple contact ends.

Exemplarily, please refer to FIG. 8 , which is a detailed flowchart of a method for detecting the curvature of a screen provided by an embodiment of the present application. The step of establishing a curved surface model of the screen 30 to be detected by using the relative positions of the contact ends of the plurality of contact bodies 22 includes:

S410, acquiring the relative position and movement displacement of each of the contact bodies 22;

S420 , using the relative positions and movement displacements of the contact bodies 22 to establish a curved surface model of the screen 30 to be detected.

The movement displacement of each contact body 22 can be detected by the displacement sensor 24 . The displacement sensor 24 is used to detect the movement and displacement of the contact body 22 after the contact body 22 contacts the screen 30 to be detected. The displacement sensor 24 can be installed at one end of the contact body 22 away from the screen 30 to be detected, so that it can move together with the contact body 22 . After the contact body 22 stops moving, the displacement of the displacement sensor 24 is the displacement of the contact body 22 . When the contact body 22 is in the initial position, the contact ends of the plurality of contact bodies 22 can be flush with each other, so that after the contact body 22 stops at the contact position, the displacement difference of the plurality of contact bodies 22 is the difference between the axial positions of the plurality of contact ends. Therefore, a curved surface model of the screen 30 to be detected can be effectively established by using the actual displacements of the plurality of contact bodies 22 . By arranging the displacement sensor 24, it is not necessary to measure the axial distance between the contact ends after the contact body 22 stops, thereby further improving the detection efficiency of the screen curvature detection device.

In the screen curvature detection device provided by the embodiment of the present application, by moving a plurality of contact bodies 22 toward the screen to be detected 30 at the same time, each contact body 22 is controlled to stop when each contact body 22 touches the screen to be detected 30 . In this way, each contact body 22 stops. The relative position data of the body 22 after contacting the screen can be transmitted to the computer, and then the computer must establish a curved surface model of the screen 30 to be detected by using the position of the contact end of the contact body 22, so that the curved surface model can be used to obtain the screen more intuitively and quickly. degree of surface. Since the plurality of contact bodies 22 move toward the screen to be detected 30 at the same time, compared with the way of laser scanning along the screen, the time required for the contact body 22 to contact the screen to be detected 30 is shorter, thereby improving the accuracy of the screen. Surface detection efficiency. When it is necessary to detect a larger size screen, multiple screen curvature detection devices can be assembled together; when the detection efficiency of multiple screens needs to be improved, multiple screen curvature detection devices can be made to detect a plurality of corresponding sizes respectively. Screen. Therefore, the size of the single screen curvature detection device can be reasonably controlled, the curvature detection efficiency of large-size screens can be improved, and the screens of different sizes can be adapted to improve the effective utilization and detection efficiency of the single screen curvature detection device.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

In the description of this application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more features. The screen curvature detection device provided by the embodiments of the present application has been introduced in detail above. The principles and implementations of the present application are described with specific examples in this article. The descriptions of the above embodiments are only used to help understand the method of the present application. At the same time, for those skilled in the art, according to the idea of the application, there will be changes in the specific implementation and application scope. In conclusion, the content of this specification should not be construed as a limitation to the application.

Claims (11)

1. A screen curvature detection device, characterized by comprising:

a mounting seat;

a plurality of detection components mounted on the mounting seat; each detection assembly comprises a driving device, a contact body and a brake sensor, the driving device is used for driving the contact body to move towards a direction close to or far away from the mounting seat, one end, far away from the mounting seat, of the contact body is used for being in contact with a screen to be detected, and the brake sensor is used for detecting the contact state of the contact body and the screen to be detected; when the brake sensor detects that the contact body contacts the screen to be detected, the driving device controls the contact body to stop moving.

2. A screen curvature detecting device according to claim 1, wherein the driving device comprises an electromagnetic driving device.

3. The screen camber detecting device according to claim 1, wherein the braking sensor includes a force sensor for detecting a contact force of the contact body with the screen to be detected; when the current detection value of the force sensor is larger than or equal to a preset value, the driving device controls the contact body to stop moving.

4. The screen curvature detection device of claim 3, wherein the preset value is set to 0.1 kgf to 0.2 kgf.

5. The screen camber detecting device according to any one of claims 1 to 4, wherein a radial dimension of the contact body is set to 1mm to 5mm.

6. The screen camber detecting device according to any one of claims 1 to 4, wherein a pitch between adjacent two contact bodies is set to 1mm to 10mm.

7. The screen camber detecting device according to any one of claims 1 to 4, wherein an end surface of the contact body at an end away from the mount base is a convex arc surface.

8. The screen camber detecting device of any one of claims 1 to 4, wherein the detecting assembly further comprises a displacement sensor for detecting a movement displacement of the contact body after the contact body contacts the screen to be detected.

9. A method for detecting the curvature of a screen is characterized by comprising the following steps:

providing a plurality of contact bodies;

controlling each contact body to move towards a screen to be detected;

determining that each contact body contacts the screen to be detected, and controlling each contact body to stop moving;

and establishing a curved surface model of the screen to be detected by utilizing the relative positions of the contact ends of the plurality of contact bodies.

10. The method for detecting the curvature of the screen according to claim 9, wherein the step of determining that each of the contact bodies contacts the screen to be detected and controlling each of the contact bodies to stop moving comprises:

acquiring the current axial bearing force of each contact body;

and determining that the current axial bearing force of each contact body is greater than or equal to a preset value, and controlling each contact body to stop moving.

11. The method for detecting the curvature of the screen as claimed in claim 9, wherein the step of establishing the curved surface model of the screen to be detected by using the relative positions of the contact ends of the plurality of contact bodies comprises:

acquiring the relative position and the movement displacement of each contact body;

and establishing a curved surface model of the screen to be detected by utilizing the relative position and the motion displacement of each contact body.

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