Liquid crystal film coating uniformity detection device and detection method

Abstract

The invention relates to the technical field of detection devices, in particular to a liquid crystal film coating uniformity detection device and method. The first detection mechanism comprises a first stator and a first rotating cylinder; the first stator is provided with a plurality of first brackets; the first support is provided with a first fixing shaft and a second fixing shaft in the axial direction of the first rotating cylinder. The first support is provided with a first lifting assembly used for driving the first fixing shaft and the second fixing shaft to ascend and descend. A first detection assembly is arranged at the top of the first bracket; the device further comprises a second detection mechanism. Under the action of the first strain adjusting assembly, the first sliding strip retracts into the first containing groove through the first strain adjusting assembly, so that a liquid crystal film between the first fixing shaft and the second fixing shaft recovers to a natural state under the action of self tension, and the detection precision can be effectively improved; in addition, through a secondary detection mode, the detection accuracy can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a liquid crystal film coating uniformity detection device and a detection method. Background Art

[0002] With the development of display technology and decorative materials, liquid crystal film has been widely used in various fields due to its unique optical properties, such as display screens, decorative films, and safety signs. Liquid crystal film is usually an optical reflective film formed by coating a layer of liquid crystal coating on the surface of a plastic film. Due to the reflection and refraction properties of the liquid crystal coating on light, the liquid crystal film can present a variety of and colorful effects.

[0003] However, the visual effect of the liquid crystal film depends largely on the uniformity of the liquid crystal coating. If the liquid crystal coating is partially unevenly coated, it will cause abnormal light reflection, thus affecting the visual effect of the final product. Therefore, ensuring the uniformity of the liquid crystal coating is a very critical part of the production process.

[0004] At present, the quality inspection of liquid crystal film mostly adopts the roller-type continuous inspection method to improve the inspection efficiency. In this inspection method, the liquid crystal film is conveyed by rollers and the quality inspection is carried out at the same time. In order to ensure the good fit between the liquid crystal film and the roller and the normal feeding, the roller will exert a certain pulling force on the liquid crystal film. Although this method can achieve efficient continuous inspection, it also brings some problems: Tensile deformation: For liquid crystal films with small strain, large tensile deformation is easy to occur under this tensile force. This will not only affect the structural integrity of the liquid crystal coating, but also cause the coating to produce uneven optical performance changes due to substrate deformation, thus affecting the accuracy of the test results.

[0005] Insufficient single-time inspection accuracy: Existing inspection methods usually only conduct one inspection, lacking repeatability and comparative analysis. This means that even if defects are found in certain areas, it is difficult to determine whether these defects are systematic errors or accidental phenomena, thus reducing the reliability of the overall inspection. Summary of the invention

[0006] The purpose of the present invention is to provide a liquid crystal film coating uniformity detection device and detection method in view of the above-mentioned deficiencies in the prior art.

[0007] The object of the present invention is achieved through the following technical solutions: A liquid crystal film coating uniformity detection device comprises a frame and a first detection mechanism; The first detection mechanism includes a first stator arranged on the frame and a first rotating cylinder rotatably arranged on the first stator; the first stator is provided with a plurality of first brackets; the first bracket is provided with a first fixed shaft and a second fixed shaft along the axial direction of the first rotating cylinder; The first bracket is provided with a first lifting component for driving the first fixed shaft and the second fixed shaft to rise and fall; the top of the first bracket is provided with a first detection component; A plurality of first accommodating grooves are axially arranged on the outer periphery of the first rotating cylinder; and first sliding bars are movably and telescopically arranged in the first accommodating grooves.

[0008] The present invention is further configured such that the first stator is provided with a truncated cone portion; the first rotating cylinder is sleeved outside the truncated cone portion; It also includes a first strain adjustment component; when the first accommodating groove is rotated to between the first fixed axis and the second fixed axis, the first sliding bar is retracted into the first accommodating groove through the first strain adjustment component.

[0009] The present invention is further configured such that the first lifting assembly includes a cylinder arranged on the top of the first bracket, a connecting block connected to the output end of the cylinder, and a lifting seat connected to the connecting block; the first fixed shaft and the second fixed shaft are respectively fixed on both sides of the lifting seat; and a pressure sensor is provided on the top of the first sliding bar.

[0010] The present invention is further configured such that the first detection component includes a light source arranged along the axial direction of the first rotating cylinder and a detection plate arranged along the axial direction of the first rotating cylinder; the light source and the detection plate are respectively arranged on both sides of the top of the first bracket; the light source and the detection plate are arranged at an angle.

[0011] The present invention is further configured such that the detection plate is provided with a plurality of sensors; the plurality of sensors are distributed on the detection plate in a matrix along the axial direction of the first rotating cylinder.

[0012] The present invention is further configured such that the first strain adjustment component comprises a driving disc disposed at the end of the truncated cone portion, a driving rod disposed at the first sliding bar, and a return spring disposed between the first accommodating groove and the first sliding bar; A placement cavity is provided in the first rotating cylinder; the driving disc is provided in the placement cavity; one end of the driving rod is connected to the first sliding bar; and a roller is provided after the other end of the driving rod protrudes into the placement cavity; A driving ring is provided on the outer circumference of the driving disc; the roller abuts against the inner wall of the driving ring; a protrusion extends inwardly from the inner wall of the driving ring; when the first accommodating groove rotates to between the first fixed axis and the second fixed axis, the roller abuts against the protrusion so that the first sliding bar retracts into the first accommodating groove.

[0013] The present invention is further configured such that a push rod is provided inside the truncated cone portion; the output end of the push rod is connected to the driving disc; the raised portion is provided with a first conical surface; and the roller is provided with a second conical surface matching the first conical surface.

[0014] The present invention is further configured to include a second detection mechanism; The second detection mechanism includes a second stator disposed on the frame and a second rotating cylinder rotatably disposed on the second stator; the second stator is provided with a plurality of second brackets; the second bracket is provided with a third fixed shaft and a fourth fixed shaft along the axial direction of the second rotating cylinder; The second bracket is provided with a second lifting assembly for driving the third fixed shaft and the fourth fixed shaft to rise and fall; the top of the second bracket is provided with a second detection assembly; A plurality of second accommodating grooves are axially arranged on the outer periphery of the second rotating cylinder; and second sliding bars are movably and telescopically arranged in the second accommodating grooves.

[0015] The present invention is further configured to further include a second strain adjustment component; when the second accommodation groove is rotated to between the third fixed axis and the fourth fixed axis, the second sliding bar is retracted into the second accommodation groove through the second strain adjustment component; The second rotating cylinder is provided with a flat surface at the second accommodating groove; when the second accommodating groove rotates to between the third fixed axis and the fourth fixed axis, the third fixed axis and the fourth fixed axis respectively abut against two sides of the flat surface.

[0016] A liquid crystal film coating uniformity detection method adopts a liquid crystal film coating uniformity detection device for detection.

[0017] Beneficial effects of the present invention: The present invention retracts the first sliding bar into the first accommodating groove through the first strain adjustment component under the action of the first strain adjustment component, so that the liquid crystal film between the first fixed axis and the second fixed axis recovers to a natural state under the action of its own tension, and then detects the liquid crystal film between the first fixed axis and the second fixed axis through the first detection component, thereby effectively improving the detection accuracy; in addition, the present invention can effectively improve the detection accuracy through secondary detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the first detection mechanism of the present invention; Figure 3 is a schematic structural diagram of a first bracket of the present invention; Figure 4 is a structural schematic diagram of the first bracket of the present invention from another viewing angle; Figure 5 is a cross-sectional view of the first detection mechanism of the present invention; Figure 6 yes Figure 5A partial enlarged view of the A part; Figure 7 is a cross-sectional view of the first detection mechanism of the present invention from another viewing angle; Figure 8 yes Figure 7 A partial enlarged view of the B area; Fig. 9 is a schematic structural diagram of the second detection mechanism of the present invention; Fig.10 is a cross-sectional view of the second detection mechanism of the present invention; Among them: 1. frame; 2. first stator; 21. truncated cone; 22. push rod; 23. driving disc; 24. driving ring; 25. raised portion; 26. first conical surface; 3. first rotating cylinder; 31. placement cavity; 4. first bracket; 41. first fixed axis; 42. second fixed axis; 43. cylinder; 44. connecting block; 45. lifting seat; 5. first accommodating groove; 51. reset spring; 52. first sliding bar; 53. driving rod; 54. roller; 55. second conical surface; 56. pressure sensor; 61. light source; 62. detection plate; 63. sensor; 71. second stator; 72. second rotating cylinder; 73. second bracket; 74. third fixed axis; 75. fourth fixed axis; 81. second lifting assembly; 82. second detection assembly; 83. second accommodating groove; 84. second sliding bar; 9. flat surface. DETAILED DESCRIPTION

[0020] The present invention is further described in conjunction with the following examples.

[0021] Depend on Figures 1 to 10 It can be seen that a liquid crystal film coating uniformity detection device of this embodiment includes a frame 1 and a first detection mechanism; the first detection mechanism includes a first stator 2 arranged on the frame 1 and a first rotating cylinder 3 rotatably arranged on the first stator 2; the first stator 2 is provided with a plurality of first brackets 4; the first bracket 4 is provided with a first fixed shaft 41 and a second fixed shaft 42 along the axial direction of the first rotating cylinder 3; the first bracket 4 is provided with a first lifting assembly for driving the first fixed shaft 41 and the second fixed shaft 42 to rise and fall; the top of the first bracket 4 is provided with a first detection assembly; the outer periphery of the first rotating cylinder 3 is provided with a plurality of first accommodating grooves 5 along the axial direction; the first accommodating groove 5 is provided with a first sliding bar 52 movably and retractably. A liquid crystal film coating uniformity detection device of this embodiment, the first stator 2 is provided with a truncated cone portion 21; the first rotating cylinder 3 is sleeved outside the truncated cone portion 21; and also includes a first strain adjustment assembly; when the first accommodating groove 5 rotates to between the first fixed shaft 41 and the second fixed shaft 42, the first sliding bar 52 is retracted into the first accommodating groove 5 through the first strain adjustment assembly.

[0022] Specifically, through the above-mentioned arrangement, the liquid crystal film is conveyed through the first rotating cylinder 3. During normal conveying, the first lifting assembly drives the first fixed shaft 41 and the second fixed shaft 42 to rise. At the same time, under the action of the first strain adjustment assembly, the first sliding bar 52 extends out of the first accommodating groove 5 at a position other than between the first fixed shaft 41 and the second fixed shaft 42.

[0023] When it is necessary to detect the liquid crystal film, first rotate the first accommodating groove 5 and the first sliding bar 52 to between the first fixed shaft 41 and the second fixed shaft 42, then stop the transmission of the liquid crystal film, and the first lifting component drives the first fixed shaft 41 and the second fixed shaft 42 to descend, so that the liquid crystal film is fixed on the first rotating cylinder 3, and under the action of the first strain adjustment component, the first sliding bar 52 is retracted into the first accommodating groove 5 through the first strain adjustment component, so that the liquid crystal film between the first fixed shaft 41 and the second fixed shaft 42 returns to a natural state under the action of its own tension, and then the liquid crystal film between the first fixed shaft 41 and the second fixed shaft 42 is detected by the first detection component, thereby effectively improving the detection accuracy.

[0024] A liquid crystal film coating uniformity detection device of this embodiment, the first lifting component includes a cylinder 43 arranged on the top of the first bracket 4, a connecting block 44 connected to the output end of the cylinder 43, and a lifting seat 45 connected to the connecting block 44; the first fixed axis 41 and the second fixed axis 42 are respectively fixed on both sides of the lifting seat 45; a pressure sensor 56 is provided on the top of the first sliding bar 52.

[0025] Specifically, through the above-mentioned arrangement, the cylinder 43 can be started, and the cylinder 43 can drive the first fixed axis 41 and the second fixed axis 42 to rise and fall through the connecting block 44 and the lifting seat 45, wherein the first fixed axis 41 and the second fixed axis 42 are arranged in parallel, so that the liquid crystal film can be stably fixed; the pressure sensor 56 is convenient for measuring the pressure value generated when the liquid crystal film is pulled.

[0026] In the present embodiment, a liquid crystal film coating uniformity detection device is provided, wherein the first detection component comprises a light source 61 arranged along the axial direction of the first rotating cylinder 3 and a detection plate 62 arranged along the axial direction of the first rotating cylinder 3; the light source 61 and the detection plate 62 are respectively arranged on both sides of the top of the first bracket 4; the light source 61 and the detection plate 62 are arranged obliquely. Specifically, the light source 61 emits incident light to the surface of the liquid crystal film, and the incident light is reflected by the liquid crystal film and then received by the sensor 63, and the wavelength and frequency signal of the reflected light is transmitted to the external signal analysis unit for analysis and processing, and the uniformity of the reflected light of the liquid crystal film is detected, thereby detecting the uniformity of the liquid crystal film coating.

[0027] In the present embodiment, a liquid crystal film coating uniformity detection device is provided with a plurality of sensors 63 on the detection plate 62; the plurality of sensors 63 are distributed on the detection plate 62 in a matrix along the axial direction of the first rotating cylinder 3. Specifically, the above arrangement can effectively measure each position of the liquid crystal film between the first rotating cylinder 3 and the second rotating cylinder 72.

[0028] In the present embodiment, a liquid crystal film coating uniformity detection device, the first strain adjustment component includes a driving disc 23 provided at the end of the truncated table portion 21, a driving rod 53 provided at the first sliding bar 52, and a return spring 51 provided between the first accommodating groove 5 and the first sliding bar 52; The first rotating cylinder 3 is provided with a placement cavity 31; the driving disc 23 is provided in the placement cavity 31; one end of the driving rod 53 is connected to the first sliding bar 52; the other end of the driving rod 53 protrudes into the placement cavity 31 and is provided with a roller 54; A driving ring 24 is provided on the outer circumference of the driving disc 23; the roller 54 abuts against the inner wall of the driving ring 24; a protrusion 25 extends inward from the inner wall of the driving ring 24; when the first accommodating groove 5 rotates to between the first fixed shaft 41 and the second fixed shaft 42, the roller 54 abuts against the protrusion 25 so that the first sliding bar 52 retracts into the first accommodating groove 5.

[0029] The protrusion 25 is disposed between the first fixing shaft 41 and the second fixing shaft 42 .

[0030] Specifically, through the above-mentioned arrangement, the liquid crystal film is transported through the first rotating cylinder 3. During normal transportation, the first lifting assembly drives the first fixed shaft 41 and the second fixed shaft 42 to rise. At the same time, due to the abutment of the roller 54 against the inner wall of the driving ring 24 outside the protrusion 25, and under the action of the reset spring 51, the first sliding bar 52 extends out of the first accommodating groove 5 at a position outside the first fixed shaft 41 and the second fixed shaft 42.

[0031] When it is necessary to detect the liquid crystal film, firstly, the first accommodating groove 5 and the first sliding bar 52 are rotated to between the first fixed shaft 41 and the second fixed shaft 42, and then the transmission of the liquid crystal film is stopped, and the first lifting assembly drives the first fixed shaft 41 and the second fixed shaft 42 to descend, so as to fix the liquid crystal film on the first rotating cylinder 3; at this time, the roller 54 of the first sliding bar 52 moves to the protrusion 25, and the inner wall of the protrusion 25 is thicker, so that the protrusion 25 pushes the first sliding bar 52 to overcome the elastic force of the reset spring 51, and the first sliding bar 52 is retracted into the first accommodating groove 5 through the first strain adjustment assembly, so that the liquid crystal film between the first fixed shaft 41 and the second fixed shaft 42 recovers to a natural state under the action of its own tension, and then the liquid crystal film between the first fixed shaft 41 and the second fixed shaft 42 is detected by the first detection assembly, so that the detection accuracy can be effectively improved.

[0032] In the present embodiment, a liquid crystal film coating uniformity detection device is provided, wherein a push rod 22 is provided in the truncated cone portion 21; the output end of the push rod 22 is connected to a driving disc 23; the raised portion 25 is provided with a first conical surface 26; and the roller 54 is provided with a second conical surface 55 matching the first conical surface 26.

[0033] Specifically, through the above arrangement, the push rod 22 drives the driving disc 23 to move forward and backward, and under the cooperation of the first conical surface 26 and the first conical surface 26, the telescopic distance of the first sliding bar 52 can be controlled, so as to adapt to the detection of liquid crystal films with different strains.

[0034] The liquid crystal film coating uniformity detection device of this embodiment further includes a second detection mechanism; The second detection mechanism includes a second stator 71 arranged on the frame 1 and a second rotating cylinder 72 rotatably arranged on the second stator 71; the second stator 71 is provided with a plurality of second brackets 73; the second bracket 73 is provided with a third fixed shaft 74 and a fourth fixed shaft 75 along the axial direction of the second rotating cylinder 72; wherein the structure of the second stator 71 is the same as that of the first stator 2, the structure of the second bracket 73 is the same as that of the first bracket 4, the structure of the third fixed shaft 74 and the structure of the fourth fixed shaft 75 are respectively the same as the structure of the first fixed shaft 41 and the structure of the second fixed shaft 42.

[0035] The second bracket 73 is provided with a second lifting assembly 81 for driving the third fixed shaft 74 and the fourth fixed shaft 75 to rise and fall; a second detection assembly 82 is provided on the top of the second bracket 73; wherein the structure of the second lifting assembly 81 is the same as that of the first lifting assembly, and the structure of the second detection assembly 82 is the same as that of the first detection assembly.

[0036] The outer periphery of the second rotating cylinder 72 is provided with a plurality of second receiving grooves 83 along the axial direction; the second receiving grooves 83 are movably provided with second sliding bars 84. The structure of the second receiving grooves 83 is the same as that of the first receiving grooves 5, and the structure of the second sliding bars 84 is the same as that of the first sliding bars 52.

[0037] A liquid crystal film coating uniformity detection device of the present embodiment also includes a second strain adjustment component; when the second accommodating groove 83 rotates to between the third fixed axis 74 and the fourth fixed axis 75, the second sliding bar 84 retracts into the second accommodating groove 83 through the second strain adjustment component; wherein the structure of the second strain adjustment component is the same as that of the first strain adjustment component.

[0038] The second rotating cylinder 72 is provided with a flat surface 9 at the second receiving groove 83 ; when the second receiving groove 83 rotates to between the third fixed shaft 74 and the fourth fixed shaft 75 , the third fixed shaft 74 and the fourth fixed shaft 75 respectively abut against two sides of the flat surface 9 .

[0039] Specifically, the second detection mechanism described in this embodiment is different from the first detection mechanism in that the second rotating cylinder 72 is provided with a flat surface 9 at the second accommodating groove 83, so that the liquid crystal film is fixed in a flat manner between the third fixed axis 74 and the fourth fixed axis 75 at the flat surface 9; in conjunction with the first detection component, the detection accuracy of the liquid crystal film can be further improved.

[0040] A liquid crystal film coating uniformity detection method of this embodiment uses a liquid crystal film coating uniformity detection device for detection.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A liquid crystal film coating uniformity detection device, characterized in that: It includes a frame and a first detection mechanism; The first detection mechanism includes a first stator arranged on the frame and a first rotating cylinder rotatably arranged on the first stator; the first stator is provided with a plurality of first brackets; the first bracket is provided with a first fixed shaft and a second fixed shaft along the axial direction of the first rotating cylinder; The first bracket is provided with a first lifting component for driving the first fixed shaft and the second fixed shaft to rise and fall; the top of the first bracket is provided with a first detection component; A plurality of first accommodating grooves are axially arranged on the outer circumference of the first rotating cylinder; the first accommodating grooves are movably and telescopically provided with first sliding bars; Also included is a second detection mechanism; The second detection mechanism includes a second stator disposed on the frame and a second rotating cylinder rotatably disposed on the second stator; the second stator is provided with a plurality of second brackets; the second bracket is provided with a third fixed shaft and a fourth fixed shaft along the axial direction of the second rotating cylinder; The second bracket is provided with a second lifting assembly for driving the third fixed shaft and the fourth fixed shaft to rise and fall; the top of the second bracket is provided with a second detection assembly; A plurality of second accommodating grooves are axially arranged on the outer periphery of the second rotating cylinder; and second sliding bars are movably and telescopically arranged in the second accommodating grooves.

2. A liquid crystal film coating uniformity detection device according to claim 1, characterized in that: The first stator is provided with a truncated cone portion; the first rotating cylinder is sleeved outside the truncated cone portion; It also includes a first strain adjustment component; when the first accommodating groove is rotated to between the first fixed axis and the second fixed axis, the first sliding bar is retracted into the first accommodating groove through the first strain adjustment component.

3. A liquid crystal film coating uniformity detection device according to claim 2, characterized in that: The first lifting assembly includes a cylinder arranged on the top of the first bracket, a connecting block connected to the output end of the cylinder, and a lifting seat connected to the connecting block; the first fixed shaft and the second fixed shaft are respectively fixed on both sides of the lifting seat; a pressure sensor is provided on the top of the first sliding bar.

4. The liquid crystal film coating uniformity detection device according to claim 2, characterized in that: The first detection assembly includes a light source arranged along the axial direction of the first rotating cylinder and a detection plate arranged along the axial direction of the first rotating cylinder; the light source and the detection plate are respectively arranged on both sides of the top of the first bracket; the light source and the detection plate are arranged obliquely.

5. The liquid crystal film coating uniformity detection device according to claim 4, characterized in that: The detection plate is provided with a plurality of sensors; the plurality of sensors are distributed on the detection plate in a matrix along the axial direction of the first rotating cylinder.

6. The liquid crystal film coating uniformity detection device according to claim 2, characterized in that: The first strain adjustment component includes a driving disc disposed at the end of the truncated cone portion, a driving rod disposed on the first sliding bar, and a return spring disposed between the first accommodating groove and the first sliding bar; A placement cavity is provided in the first rotating cylinder; the driving disc is provided in the placement cavity; one end of the driving rod is connected to the first sliding bar; the other end of the driving rod protrudes into the placement cavity and is provided with a roller; A driving ring is provided on the outer circumference of the driving disc; the roller abuts against the inner wall of the driving ring; a protrusion extends inwardly from the inner wall of the driving ring; when the first accommodating groove rotates to between the first fixed axis and the second fixed axis, the roller abuts against the protrusion so that the first sliding bar retracts into the first accommodating groove.

7. The liquid crystal film coating uniformity detection device according to claim 6, characterized in that: A push rod is arranged inside the truncated cone portion; the output end of the push rod is connected to the driving disc; the raised portion is provided with a first conical surface; and the roller is provided with a second conical surface matched with the first conical surface.

8. The liquid crystal film coating uniformity detection device according to claim 1, characterized in that: It also includes a second strain adjustment component; when the second accommodation groove is rotated to between the third fixed axis and the fourth fixed axis, the second sliding bar is retracted into the second accommodation groove through the second strain adjustment component; The second rotating cylinder is provided with a flat surface at the second accommodating groove; when the second accommodating groove rotates to between the third fixed axis and the fourth fixed axis, the third fixed axis and the fourth fixed axis respectively abut against two sides of the flat surface.

9. A method for detecting uniformity of liquid crystal film coating, characterized in that: The liquid crystal film coating uniformity detection device described in any one of claims 1 to 8 is used for detection.

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