Device for measuring edge end face characteristics of liquid crystal glass substrate

Abstract

The invention discloses a liquid crystal glass substrate edge end face characteristic measuring device, which comprises a shading camera obscura, a clamping mechanism, a detection mechanism, a display mechanism and a controller, and is characterized in that the clamping mechanism comprises two clamping plates which are positioned on two sides of a glass substrate and can vertically clamp and fix the glass substrate in the shading camera obscura; the detection mechanism comprises a laser sensor assembly and a walking assembly which are located in the shading camera obscura, the laser sensor assembly can be driven by the walking assembly to move under the edge end face of the clamped glass substrate, the laser sensor assembly comprises a light-emitting element and a light-receiving element, the light-emitting element is used for emitting laser to the edge end face of the glass substrate, and the light-receiving element is used for receiving light from the edge end face of the glass substrate. The light receiving element is used for receiving laser reflected by the edge end face of the glass substrate, the light receiving element and the display mechanism are both in communication connection with the controller, the display mechanism can receive and display a laser intensity signal transmitted by the controller, and the measuring device can comprehensively and accurately detect the quality of the edge end face of the glass substrate.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices, and particularly relates to a measuring device for the edge end face characteristics of a liquid crystal glass substrate. Background Art

[0002] During the production process of liquid crystal glass substrates, it is necessary to detect the quality of the edge end faces of the ground liquid crystal glass. However, the existing edge detection methods for LCD and OLED liquid crystal glass substrates cannot detect some minute unevenness on the edges, and there is no analysis of the changes in the entire edge end face, which is not conducive to the confirmation of product quality. Summary of the Invention

[0003] To solve the technical problems existing in the background art, the present invention proposes a measuring device for the edge end face characteristics of a liquid crystal glass substrate.

[0004] The measuring device for the edge end face characteristics of a liquid crystal glass substrate includes: a light-shielding dark box, a clamping mechanism, a detection mechanism, a display mechanism, and a controller. The clamping mechanism includes two clamping plates located on both sides of the glass substrate and capable of vertically clamping and fixing the glass substrate in the light-shielding dark box. The detection mechanism includes a laser sensor assembly and a walking assembly located in the light-shielding dark box. The laser sensor assembly can move under the drive of the walking assembly directly below the edge end face of the clamped glass substrate, and the moving path should cover the horizontal projection of the entire edge end face of the glass substrate. The laser sensor assembly includes a light-emitting element and a light-receiving element. The light-emitting element is used to emit laser light towards the edge end face of the glass substrate, and the light-receiving element is used to receive the laser light reflected by the edge end face of the glass substrate. The light-receiving element and the display mechanism are both communicatively connected to the controller. The display mechanism can receive the laser intensity signal transmitted by the controller and display it.

[0005] Preferably, the clamping mechanism further includes a push rod and a pressure sensor. The push rod is used to apply pressure to the clamping plate for clamping the glass substrate. The pressure sensor is connected to the head of the push rod. The pressure sensor can measure the pressure applied by the push rod to the clamping plate, and the pressure sensor is communicatively connected to the controller.

[0006] Preferably, the clamping mechanism further includes a driving component connected to the tail of the push rod. The driving component can drive the push rod to push the two clamping plates to synchronously displace to both sides of the glass substrate.

[0007] Preferably, the measuring device further includes an alarm mechanism electrically connected to the controller. When the laser intensity received by the light-receiving element is not within the threshold range, the alarm mechanism emits an alarm signal.

[0008] Preferably, the measuring device further includes a positioning mechanism, which includes a plurality of positioning blocks and a plurality of lifting and rotating components. The positioning blocks are connected to the tops of the lifting and rotating components, and the bottoms of the lifting and rotating components are connected below the light-shielding dark box. Positioning grooves are formed in the positioning blocks. The positioning blocks can reach the first position and the second position respectively under the drive of the moving component. At the first position, the positioning grooves of the plurality of positioning blocks are located directly above the moving path of the laser sensor component, and the glass substrate can be vertically clamped in the positioning grooves. At the second position, the positioning blocks should be separated from the glass substrate and should avoid the area directly below the edge of the glass substrate.

[0009] Preferably, the walking component includes a servo motor, a lead screw, a nut slider, and a linear guide rail. The servo motor is electrically connected to the controller. One end of the lead screw is connected to the output shaft of the servo motor, and the other end of the lead screw is rotatably connected to a vertical plate located at the end of the linear guide rail. The nut slider is meshed with the lead screw and can slide along the linear guide rail. The laser sensor component is connected to the top of the nut slider.

[0010] Preferably, the controller can transmit the displacement value signal of the servo motor to the display mechanism. The displacement value of the servo motor corresponds to the edge length of the glass substrate. The display mechanism includes an image processing unit and a display screen. The image processing unit can generate an image with the displacement value of the servo motor as the abscissa value and the laser intensity value reflected by the light-receiving element as the ordinate value and display the image on the display screen.

[0011] Preferably, a rubber pad is attached to the inner avoidance surface of the clamping plate for clamping the glass substrate.

[0012] Preferably, the top of the light-shielding dark box has an openable strip-shaped notch for taking and placing the glass substrate, and the strip-shaped notch is located directly above the moving path of the laser sensing component.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] Laser measurement has the advantages of high precision, short measurement time, and non-contact. It can quickly and accurately measure the edge end face characteristics of the glass substrate. Moreover, since the laser sensor component can move directly below the edge end face of the clamped glass substrate under the drive of the walking component and the moving path should cover the horizontal projection of the entire edge end face of the glass substrate, the entire edge end face characteristics of the glass substrate can be continuously measured, and the detection results are displayed in the display mechanism for the inspectors to intuitively and comprehensively see the test results, so as to reliably judge the quality of the edge end face of the glass substrate.

[0015] The pressure sensor can measure the pressure applied by the push rod on the clamping plate. The pressure sensor is communicatively connected to the controller to control the clamping plate to firmly clamp and fix the glass substrate without scratching the glass substrate. Description of the Drawings

[0016] Figure 1 This is the front view of the measuring device for the edge end face characteristics of the liquid crystal glass substrate proposed by the present invention.

[0017] Figure 2 This is the left view of the clamping structure of the measuring device proposed by the present invention when clamping the glass substrate.

[0018] Figure 3 This is the top view of the detection structure and positioning structure of the measuring device proposed by the present invention. Specific embodiments

[0019] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] Referring to Figures 1 to 3 A measuring device for the edge end face characteristics of a liquid crystal glass substrate includes: a light-shielding dark box 1, a clamping mechanism, a detection mechanism, a display mechanism, and a controller. The clamping mechanism includes two clamping plates 3 located on both sides of the liquid crystal glass substrate 2 and capable of vertically clamping and fixing the liquid crystal glass substrate 2 in the light-shielding dark box 1. In this embodiment, in order to more conveniently detect the edge end face characteristics of the liquid crystal glass substrate 2, the edge end face at the bottom end of the liquid crystal glass substrate 2 is exposed from the bottom ends of the two clamping plates 3. The detection mechanism includes a laser sensor assembly 4 and a walking assembly 5 located in the light-shielding dark box 1. The laser sensor assembly 4 can move under the drive of the walking assembly 5 directly below the edge end face of the clamped liquid crystal glass substrate 2, and the moving path should cover the horizontal projection of the entire edge end face of the liquid crystal glass substrate 2. The laser sensor assembly 4 includes a light-emitting element and a light-receiving element. The light-emitting element is used to emit laser light to the edge end face of the liquid crystal glass substrate 2, and the light-receiving element is used to receive the laser light reflected by the edge end face of the liquid crystal glass substrate 2. The light-receiving element and the display mechanism are both communicatively connected to the controller. The display mechanism can receive the laser intensity signal transmitted by the controller and display it.

[0021] Laser measurement has the advantages of high precision, short measurement time, and non-contact. It can quickly and accurately measure the edge end face characteristics of the liquid crystal glass substrate 2. Moreover, since the laser sensor assembly 4 can move under the drive of the walking assembly 5 directly below the edge end face of the clamped liquid crystal glass substrate 2 and the moving path should cover the horizontal projection of the entire edge end face of the liquid crystal glass substrate 2, the entire edge end face characteristics of the liquid crystal glass substrate 2 can be continuously measured, and the detection results are displayed in the display mechanism for the inspectors to intuitively and comprehensively view the test results, so as to reliably judge the quality of the edge end face of the liquid crystal glass substrate 2.

[0022] Referring to Figure 2, the clamping mechanism further includes a push rod 6 and a pressure sensor 7. The push rod 6 is used to apply pressure to the clamping plate 3 for clamping the liquid crystal glass substrate 2. The pressure sensor 7 is connected to the head of the push rod 6. The pressure sensor 7 can measure the pressure applied by the push rod 6 on the clamping plate 3. The pressure sensor 7 is communicatively connected to the controller to control the clamping plate 3 to firmly clamp and fix the liquid crystal glass substrate 2 without scratching it. In this embodiment, in order to ensure that the push rod 6 can push the clamping plate 3 more smoothly, the push rod 6 is connected through the plate body 14. Guide sleeves 15 are provided at the four corners of the plate body 14, and guide rods 16 adapted to the guide sleeves 15 and passing through the guide sleeves 15 are provided on the clamping plate 3.

[0023] Referring to Figure 2 , the clamping mechanism further includes a driving assembly 9. The driving assembly 9 is connected to the tail of the push rod 6. The driving assembly 9 can drive the push rod 6 to push the two clamping plates 3 to synchronously displace to both sides of the liquid crystal glass substrate 2. In this embodiment, a cylinder is used as the driving assembly 9, and the extension and retraction speeds of the two cylinders can be adjusted to be the same by setting a throttle valve, etc.

[0024] The measuring device further includes an alarm mechanism. The alarm mechanism is electrically connected to the controller. When the laser intensity received by the light-receiving element is not within the threshold range, the alarm mechanism emits an alarm signal so that the tester can timely and reliably detect and locate the unqualified parts on the edge end face of the liquid crystal glass substrate 2.

[0025] Referring to Figure 1 , Figure 3 , the measuring device further includes a positioning mechanism. The positioning mechanism includes a plurality of positioning blocks 10 and a plurality of lifting and rotating assemblies 11. The positioning blocks 10 are connected to the tops of the lifting and rotating assemblies 11. The bottoms of the lifting and rotating assemblies 11 are connected below the light-shielding dark box 1. Positioning grooves 101 are formed on the positioning blocks 10. The positioning blocks 10 can reach the first position and the second position respectively under the drive of the moving assembly. Referring to Figure 1 , at the first position, the positioning grooves 101 of the plurality of positioning blocks 10 are located directly above the moving path of the laser sensor assembly 4, and the liquid crystal glass substrate 2 can be vertically placed in the positioning grooves 101. Referring to Figure 3 , at the second position, the positioning blocks 10 should be separated from the liquid crystal glass substrate 2 and should avoid the area directly below the edge of the liquid crystal glass substrate 2. In this embodiment, the lifting and rotating assembly includes a linear lifting cylinder 111, a vane rotating cylinder 112 connected to the piston of the cylinder 111, and an L-shaped bar connected to the rotating shaft of the vane rotating cylinder 112. The end of the L-shaped bar is connected to the positioning block 10.

[0026] In this embodiment, the liquid crystal glass substrate 2 needs to be first clamped in the positioning grooves 101 of a plurality of positioning blocks 10 at the first position. Subsequently, after moving the clamping plate 3 to clamp the liquid crystal glass substrate 2, the piston of the cylinder 11 retracts to make the positioning blocks 10 descend and separate from the liquid crystal glass substrate 2. Then, rotate the vane rotation cylinder 112, and the positioning blocks 10 move to the second position. Subsequently, the laser sensor assembly 4 can be used to detect the edge end face of the liquid crystal glass substrate 2.

[0027] Referring to Figure 3 , the traveling assembly 5 includes a servo motor 51, a lead screw 52, a nut slider 53, and a linear guide 54. The servo motor 51 is electrically connected to the controller. One end of the lead screw 52 is connected to the output shaft of the servo motor 51, and the other end of the lead screw 52 is rotatably connected to the linear guide 54. The nut slider 53 is meshed and connected to the vertical plate 55 at the end of the lead screw 52 and can slide along the linear guide 54. The laser sensor assembly 4 is connected to the top of the nut slider 53. Parameters such as the rotation speed of the servo motor 51 can be pre-stored in the controller to reliably control the moving speed of the laser sensor assembly 4.

[0028] The controller can transmit the displacement value signal of the servo motor 51 to the display mechanism. The displacement value of the servo motor 51 corresponds to the edge length of the liquid crystal glass substrate 2. The display mechanism includes an image processing unit and a display screen 12. The image processing unit can generate an image with the displacement value of the servo motor 51 as the abscissa value and the laser intensity value reflected by the light receiving element as the ordinate value and display the image on the display screen 12, so that the detection personnel can further intuitively observe the edge end face characteristics of the liquid crystal glass substrate 2 and can conveniently observe the laser intensity value corresponding to each position of the edge end face of the liquid crystal glass substrate 2, thereby quickly and accurately judging the quality of that place.

[0029] A rubber pad 13 is attached to the inner wall surface of the clamping plate 3 for clamping the liquid crystal glass substrate 2 to further protect the liquid crystal glass substrate 2 from being damaged by clamping.

[0030] The top of the light-shielding dark box 1 has an openable strip-shaped notch 1a for taking and placing the liquid crystal glass substrate 2, and the strip-shaped notch 1a is directly above the moving path of the laser sensing assembly 4.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A device for measuring the edge end features of a liquid crystal glass substrate, characterized in that: The invention comprises: a light-shielding dark box (1), a clamping mechanism, a detection mechanism, a display mechanism, and a controller. The clamping mechanism comprises two clamping plates (3) located on both sides of a liquid crystal glass substrate (2) and capable of vertically clamping and fixing the liquid crystal glass substrate (2) in the light-shielding dark box (1). The detection mechanism comprises a laser sensor assembly (4) and a walking assembly (5) located in the light-shielding dark box (1). The laser sensor assembly (4) can be driven by the walking assembly (5) to move directly below the edge end face of the clamped liquid crystal glass substrate (2), and the moving path should cover the horizontal projection of the entire edge end face of the liquid crystal glass substrate (2). The laser sensor assembly (4) comprises a light-emitting element and a light-receiving element. The light-emitting element is used to emit laser light to the edge end face of the liquid crystal glass substrate (2). The light-receiving element is used to receive laser light reflected by the edge end face of the liquid crystal glass substrate (2). The light-receiving element and the display mechanism are both connected to the controller for communication. The display mechanism can receive and display a laser intensity signal transmitted by the controller.

2. The device for measuring the edge end surface characteristics of a liquid crystal glass substrate according to claim 1, characterized in that: The clamping mechanism further comprises a push rod (6) and a pressure sensor (7). The push rod (6) is used to apply pressure to the clamping plate (3) to clamp the liquid crystal glass substrate (2). The pressure sensor (7) is connected to the head of the push rod (6). The pressure sensor (7) can test the pressure applied by the push rod (6) on the clamping plate (3). The pressure sensor (7) is connected to the controller for communication.

3. The device for measuring the edge end surface characteristics of a liquid crystal glass substrate according to claim 2, characterized in that: The clamping mechanism also includes a driving assembly (9) which is connected to the rear end of the push rod (6). The driving assembly (9) can drive the push rod (6) to push the two clamping plates (3) to synchronously move to the two sides of the liquid crystal glass substrate (2).

4. The device for measuring the edge end features of a liquid crystal glass substrate according to claim 1, characterized in that: It also includes an alarm mechanism, which is electrically connected to the controller. When the laser intensity received by the light receiving element is not within a threshold range, the alarm mechanism sends out an alarm signal.

5. The device for measuring the edge end surface characteristics of a liquid crystal glass substrate according to claim 1, characterized in that: The invention also comprises a positioning mechanism, which comprises a plurality of positioning blocks (10) and a plurality of lifting and rotating components (11). The positioning blocks (10) are connected to the top of the lifting and rotating components (11), and the bottom of the lifting and rotating components (11) are connected to the bottom of the light-shielding dark box (1). The positioning blocks (10) are provided with positioning grooves (101). The positioning blocks (10) can reach a first position and a second position respectively under the drive of the moving components. At the first position, the positioning grooves (101) of the plurality of positioning blocks (10) are located directly above the moving path of the laser sensor component (4), and the liquid crystal glass substrate (2) can be vertically clamped in the positioning grooves (101). At the second position, the positioning blocks (10) should be separated from the liquid crystal glass substrate (2) and should avoid the area directly below the edge of the liquid crystal glass substrate (2).

6. The device for measuring the edge end surface characteristics of a liquid crystal glass substrate according to claim 1, characterized in that: The walking assembly (5) comprises a servo motor (51), a screw rod (52), a nut slider (53), and a linear guide rail (54). The servo motor (51) is electrically connected to a controller. One end of the screw rod (52) is connected to an output shaft of the servo motor (51). The other end of the screw rod (52) is rotatably connected to a vertical plate (55) located at the end of the linear guide rail (54). The nut slider (53) is meshedly connected to the screw rod (52) and can slide along the linear guide rail (54). The laser sensor assembly (4) is connected to the top end of the nut slider (53).

7. The device for measuring the edge end surface characteristics of a liquid crystal glass substrate according to claim 6, characterized in that: The controller can transmit a displacement value signal of the servo motor (51) to a display mechanism, the displacement value of the servo motor (51) corresponds to the edge length of the liquid crystal glass substrate (2), the display mechanism comprises an image processing unit and a display screen (12), the image processing unit can generate an image with the displacement value of the servo motor (51) as a horizontal coordinate value and the intensity value of the laser reflected by the light receiving element as a vertical coordinate value, and display the image on the display screen (12).

8. The device for measuring the edge end surface characteristics of a liquid crystal glass substrate according to claim 1, characterized in that: The clamping mechanism also includes a rubber pad (13), which is attached to the inner avoidance surface of the clamping plate (3) that clamps the liquid crystal glass substrate (2).

9. The device for measuring the edge end surface characteristics of a liquid crystal glass substrate according to claim 1, characterized in that: The top of the light-shielding dark box (1) is provided with an openable and closable strip-shaped notch (1a) for taking in and placing a liquid crystal glass substrate (2); the strip-shaped notch (1a) is located directly above the moving path of the laser sensor assembly (4).

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