Die head coating control device and control method

Abstract

The invention provides a die head coating control device and method, and relates to the technical field of perovskite coating machine coating, and the die head coating control device is characterized in that lifting devices are arranged in two gantry seats; the lifting devices of the two gantry seats are connected with the first connecting plate; the first connecting plate is perpendicular to the platform deck plane; the second connecting plate comprises a first vertical plate and a second vertical plate which are vertical to each other; the first connecting plate is fixedly connected with the first vertical plate; a die head beam is fixed between the second vertical plates corresponding to the two gantry seats; a die head is fixed below the die head beam; the die head is perpendicular to the glass substrate; the gantry seat is used for driving the die head to move along one side of the plane of the carrying table to the other side opposite to the side, so that the die head completes coating of a glass substrate; the front of the advancing direction of the die head serves as the front side; a spectrum confocal sensor is fixed on the front side of the die head beam; a contact type digital sensor is arranged on the rear side of the carrying table. The time for detecting the coating uniformity can be greatly saved, and the coating convenience and operability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of perovskite coating machine coating, and more specifically, to a die head coating control device and control method. Background Art

[0002] During the coating process of the coater, it is often necessary to locate the height from the die lip to the glass surface and measure the parallelism between the die lip surface and the glass surface. When different thicknesses of coating need to be applied to the glass surface, the die height must be accurately adjusted in real time, and the parallelism between the die lip surface and the glass surface must be ensured. However, it is difficult for traditional coaters to simultaneously measure height and parallelism, which results in the inability to accurately adjust the die height during the coating process, leading to poor coating quality.

[0003] The existing distance measuring device uses a contact digital sensor to obtain the initial height value of the die head. However, each coating operation requires the die head lip to contact the sensor contact piece once. Long-term use will cause the contact digital sensor to lose value, resulting in inaccurate data. In the actual coating process, due to different batches of glass, the refractive index of different glasses will be different, and the thickness of different positions of the glass will have a difference of several microns. It is difficult for the existing distance measuring device to record the thickness change of the entire glass during the coating process and realize the dynamic adjustment of the die head during coating.

[0004] The existing distance measuring device can only detect the coating uniformity after the coating is completed. The operation steps are repetitive and complicated. If the uniformity does not meet the requirements, re-coating is required until the coating uniformity requirements are achieved. Not only is the operation complicated and time-consuming, but it also increases the cost of using the equipment. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a die coating control device and control method to solve the above-mentioned problems existing in the prior art, which can greatly save the time for detecting the uniformity of coating, while also improving the convenience and operability of coating, and reducing the complexity of the equipment and saving equipment costs.

[0006] In a first aspect, a die coating control device is provided, which may include: a carrier, two gantry seats, a first connecting plate and a second connecting plate; a glass substrate is placed on the carrier plane of the carrier; the gantry seat and the carrier are located in the same plane;

[0007] A lifting device is provided in each of the two gantry seats; the lifting devices of the two gantry seats are connected to the first connecting plate; the first connecting plate is perpendicular to the plane of the carrier;

[0008] The second connecting plate comprises a first vertical plate and a second vertical plate which are perpendicular to each other; the first connecting plate is fixedly connected to the first vertical plate;

[0009] A die beam is fixed between the second vertical plates corresponding to the two gantry seats; a die head is fixed below the die beam; and the die head is perpendicular to the glass substrate;

[0010] The gantry is used to drive the die head to move along one side of the carrier plane to another side opposite to the side, so that the die head completes coating the glass substrate; the front side of the die head in the moving direction is regarded as the front side;

[0011] A spectral confocal sensor is fixed on the front side of the die beam; the spectral confocal sensor is perpendicular to the carrier plane;

[0012] A contact digital sensor is arranged on the rear side of the carrier; the contact digital sensor is perpendicular to the plane of the carrier.

[0013] In an optional implementation, a lip is provided below the die head;

[0014] The contact element at the top of the contact digital sensor is higher than the plane of the carrier.

[0015] In a second aspect, a die coating control method is provided, which may include:

[0016] Acquire a first height value of the spectral confocal sensor from the stage plane, and a second height value of the lip when the lip contacts the contact member;

[0017] Controlling the gantry to drive the die head and the spectral confocal sensor to move forward along the moving direction of the die head;

[0018] For any position point in the traveling direction, obtaining a third height value of the spectral confocal sensor from the position point of the glass substrate before coating;

[0019] Determining a first coating control parameter of the location point based on the first height value, the second height value, the third height value and a configured target thickness value;

[0020] Based on the first coating control parameter, the die head is controlled to coat the position point of the glass substrate when it passes through the position point for the first time.

[0021] In an optional implementation, the coating control parameters include die height control parameters;

[0022] Determining a first coating control parameter of the position point based on the first height value, the second height value, the third height value and a configured target thickness value includes:

[0023] Using the difference between the first height value and the third height value as the thickness of the glass substrate at the position;

[0024] Taking the absolute value of the difference between the second height value and the thickness of the glass substrate at the position point as the thickness difference;

[0025] If the second height value is not greater than the thickness of the glass substrate at the position point, a die height control parameter of the position point is determined based on the sum of the second height value, the thickness difference value and the target thickness value.

[0026] In an optional implementation, the method further includes:

[0027] If the second height value is greater than the thickness of the glass substrate at the position point, a die height control parameter of the position point is determined based on the sum of the difference between the second height value and the thickness difference value and the target thickness value.

[0028] In an optional implementation, after controlling the die head to coat the position point of the glass substrate when passing through the position point for the first time, the method further includes:

[0029] For any position point in the traveling direction, obtaining a fourth height value of the spectral confocal sensor from the slurry coated on the position point when the spectral confocal sensor is at the position point after coating;

[0030] Taking the difference between the third height value and the fourth height value as the actual coating thickness;

[0031] Determining a second coating control parameter of the position point based on a difference between the actual coating thickness and the target thickness value;

[0032] Based on the second coating control parameter, the die head is controlled to perform re-coating on the position point when passing through the position point for the second time.

[0033] In an optional implementation, the coating control parameters further include: die parallelism control parameters;

[0034] The method further comprises:

[0035] Determining the parallelism between the lip and the glass substrate based on a third height value of each position of the glass substrate in the traveling direction;

[0036] Based on the parallelism between the lip and the glass substrate, a die parallelism control parameter is generated.

[0037] In a third aspect, a die coating control system is provided, which may include:

[0038] An acquisition unit, used for acquiring a first height value of the spectral confocal sensor from the stage plane, and a second height value of the lip when the lip is in contact with the contact member;

[0039] A control unit, used for controlling the gantry to drive the die head and the spectral confocal sensor to move forward along the traveling direction of the die head;

[0040] A measuring unit, for obtaining a third height value of the spectral confocal sensor from the glass substrate before coating at any position point in the traveling direction;

[0041] The coating unit is used to determine a first coating control parameter of the position point based on the first height value, the second height value, the third height value and the configured target thickness value; based on the first coating control parameter, control the die head to coat the position point of the glass substrate when it passes through the position point for the first time.

[0042] In a fourth aspect, an electronic device is provided, the electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0043] Memory, used to store computer programs;

[0044] The processor is used to implement the method steps described in any one of the second aspects when executing the program stored in the memory.

[0045] In a fifth aspect, a computer-readable storage medium is provided, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method steps described in any one of the above-mentioned second aspect are implemented.

[0046] The present application simultaneously realizes the real-time precise adjustment of the die head height and ensures the parallelism between the die head lip surface and the glass surface; the present application only needs to use the contact digital sensor once, which prevents the situation where the data is inaccurate due to the drop of the contact digital sensor; the present application realizes the recording of the thickness change of the whole piece of glass during the coating process and the dynamic adjustment of the die head during coating, which greatly improves the coating uniformity. The present application not only greatly saves the time of detecting the coating uniformity, but also improves the convenience and operability of coating, and reduces the complexity of the equipment and saves the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A schematic structural diagram of a die coating control device provided in an embodiment of the present application;

[0049] Figure 2 A schematic diagram of a lifting device provided in an embodiment of the present application;

[0050] Figure 3 A schematic diagram of a die head and a contact sensor provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of the position of a spectral confocal sensor provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of the position of a spectral confocal sensor provided on both the front and rear sides of a die beam according to an embodiment of the present application;

[0053] Figure 6 A flow chart of a die coating control method provided in an embodiment of the present application;

[0054] Figure 7 A schematic diagram of height measurement provided in an embodiment of the present application;

[0055] Figure 8 A lip-glass distance curve diagram of a coating process provided in an embodiment of the present application;

[0056] Fig. 9 A schematic diagram of the structure of a die coating control system provided in an embodiment of the present application;

[0057] Fig.10 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0058] In the figure: 1. gantry; 2. first connecting plate; 3. second connecting plate; 4. third connecting plate; 5. die beam; 6. die; 7. fourth connecting plate; 8. spectral confocal sensor; 9. contact digital sensor; 10. carrier plane; 11. motor; 12. guide rail; 13. lead screw; 14. glass substrate; 15. carrier; 61. lip; 91. contact piece. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0060] The die coating control method of the present application embodiment can be applied to Figure 1 In the die coating control device shown, the die coating control device includes two gantries 1, a first connecting plate 2, a second connecting plate 3, a third connecting plate 4, a die beam 5, a die 6, a fourth connecting plate 7, a spectral confocal sensor 8 and a contact digital sensor 9.

[0061] In the embodiment of the present application, there are two gantries, which are symmetrically placed on the left and right sides respectively; a lifting device is provided in each gantry seat 1; and the lifting devices of the two gantries are connected to the first connecting plate 2.

[0062] There are two first connecting plates 2, which are respectively connected to the lifting blocks on the screw rod 13. There are two second connecting plates 3, which are T-shaped plates; the second connecting plates 3 are composed of two vertical plates; the first vertical plate 31 of the second connecting plate 3 is parallel to the first connecting plate 2, and the first vertical plate 31 is fixedly connected to the first connecting plate 2; the second vertical plate 32 of the second connecting plate 3 is perpendicular to the first vertical plate 31, and the two are fixedly connected.

[0063] There are four third connecting plates 4 in total, with the front of the moving direction of the die head 6 as the front side; two parallel third connecting plates 4 are arranged in front of the gantry seat 1 on either side; and the third connecting plates 4 on this side are parallel to the first connecting plates 2 on this side; and the two third connecting plates 4 on this side are both perpendicular to the second vertical plates 32 on this side; and the third connecting plates 4 are located on the inner sides of the two second vertical plates 32 on the left and right sides.

[0064] A die head beam 5 is arranged in a space formed by four third connecting plates 4 and two second vertical plates 32 corresponding to the gantry seats; both ends of the die head beam 5 are respectively connected and fixed to the two second vertical plates 32, the front side of the die head beam 5 is the side away from the gantry seat 1, the rear side of the die head beam 5 is the side close to the gantry seat 1, and the front and rear sides of both ends of the die head beam 5 are respectively connected and fixed to the third connecting plates 4; a die head 6 is arranged at the bottom of the die head beam 5; the die head 6 is provided with a lip 61, such as Figure 3 shown.

[0065] When the first connecting plate 2 is lifted or lowered, the second connecting plate 3 is driven to be lifted or lowered synchronously. The lifting or lowering of the second connecting plate 3 drives the die beam 5 to be lifted or lowered synchronously, and further drives the die head 6 to be lifted or lowered synchronously.

[0066] One or more fourth connecting plates 7 are provided on the front side of the die beam 5; Figure 4 As shown, the front end of the fourth connecting plate 7 is connected to a spectral confocal sensor 8, which is perpendicular to the carrier plane 10; the carrier plane 10 is the upper plane of the carrier 15; the focus of the spectral confocal sensor 8 is on the carrier plane 10; the gantry 1 drives the die head 6 to move from the rear side of the carrier plane 10 to the front side of the carrier plane 10, so that the die head completes one coating of the glass substrate 14 on the carrier plane 10.

[0067] At least two contact digital sensors 9 are arranged on the rear side of the carrier 15, and the contact digital sensors 9 are perpendicular to the carrier plane 10; the top surface height of the contact piece 91 of the contact digital sensor 9 should be higher than the carrier plane 10, so as to avoid the risk of collision between the lip 61 and the contact piece 91 when the gantry 1 drives the die head 6 to move forward.

[0068] In the embodiment of the present application, the lifting device includes: a motor 11, a guide rail 12 and a screw rod 13. Figure 2 As shown, the motor 11 is placed on the top of the gantry seat 1, and the lower end of the motor 11 is connected to the screw rod 13, and the motor 11 is used to drive the screw rod 13 to rotate to achieve the lifting effect. A lifting block is provided on the screw rod 13, and the lifting block is connected to the first connecting plate 2, and the lifting block is used to drive the first connecting plate 2 to lift. Guide rails 12 are provided on both sides of any screw rod 13, and the slider on the guide rail 12 is connected to the first connecting plate 2.

[0069] In the embodiment of the present application, the die coating control device may be provided with a processor for receiving the sensing signal emitted by the contact digital sensor 9 and the light reflected by the spectral confocal sensor 8;

[0070] In one embodiment of the present application, when the width of the glass substrate 14 is relatively wide, a plurality of fourth connecting plates 7 may be provided, and a spectral confocal sensor 8 is connected to the front end of each fourth connecting plate 7; the plurality of spectral confocal sensors 8 are maintained on the same horizontal line and are perpendicular to the carrier plane 10, and the focus of each spectral confocal sensor 8 is on the carrier plane 10; the plurality of spectral confocal sensors 8 are symmetrically distributed around the center of the glass substrate 14, and the two spectral confocal sensors 8 closest to the left and right edges of the carrier plane 10 should be within the width range of the glass substrate 14, that is, when the spectral confocal sensor 8 moves to the top of the glass substrate 14, the glass substrate 14 is directly below all the spectral confocal sensors 8.

[0071] In another embodiment of the present application, Figure 5As shown, at least one fourth connecting plate 7 is respectively provided on the front and rear sides of the die beam 5, and a spectral confocal sensor 8 is respectively provided on each fourth connecting plate 7, so that when the gantry 1 drives the die 6 to move from the rear side of the stage plane 10 to the front side of the stage plane 10, the height of the spectral confocal sensor 8 from the glass substrate 14 before and after coating can be obtained at the same time.

[0072] In another embodiment of the present application, the relative position relationship between the gantry 1 and the die beam 5 can be adjusted. For example, the two gantries can be provided with corresponding motors 11, guide rails 12 and screw rods 13 on the rear side, so that the die beam 5 is located behind the gantry 1, and the die beam 5 is pulled forward by the forward movement of the gantry 1; or, the two gantries can be provided with corresponding motors 11, guide rails 12 and screw rods 13 on the inner side, so that the die beam 5 is located in the middle and rear of the two gantries 1, and the die beam 5 is driven forward by the forward movement of the gantry 1.

[0073] The preferred embodiments of the present application are described below in conjunction with the drawings in the specification. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In addition, the embodiments and features in the embodiments of the present application may be combined with each other if there is no conflict.

[0074] Figure 6 The following is a schematic flow chart of a die coating control method provided in an embodiment of the present application. Figure 2 As shown, the method may include:

[0075] Step S610, obtaining a first height value of the spectral confocal sensor from the stage plane, and a second height value of the lip when the lip contacts the digital sensor; controlling the gantry to drive the die head and the spectral confocal sensor to move forward along the moving direction of the die head.

[0076] In the embodiment of the present application, when the lip contacts the contact digital sensor, since the spectral confocal sensor is located on the front side of the die head, the spectral confocal sensor must have been located above the stage plane. At this time, the first height value (initial value H1) of the spectral confocal sensor from the stage plane, the parallelism of the stage plane measured by the spectral confocal sensor, and the second height value of the lip can be obtained simultaneously.

[0077] In the embodiment of the present application, when the gantry drives the die head to move to the top of the contact sensor, that is, in the same vertical direction, the contact digital sensor will send a sensing signal. When the processor receives the sensing signal, it will control the die head to descend until the lip just contacts the contact piece of the contact digital sensor. Figure 3As shown in the figure; the contact digital sensor measures the parallelism of the lower surface of the lip and the top surface of the contact piece, as well as the second height value of the lip at this time (initial value H); since the contact digital sensor is almost level with the carrier plane, the height of the lip from the contact sensor is approximately regarded as the second height value of the lip from the carrier plane, and its accuracy can reach the micron level, so the error caused by this can be ignored.

[0078] In the embodiment of the present application, after the second height value of the lip is measured, there is no need to use the contact digital sensor again; the contact digital sensor is only used once in the control process of the present application, preventing inaccurate data due to loss of value of the contact digital sensor.

[0079] In the embodiment of the present application, the parallelism of the stage plane measured by the spectral confocal sensor can be measured by the following steps:

[0080] Obtain the distance between the spectral confocal sensor and the stage plane collected at each position point above the stage plane; determine the parallelism of the stage plane by comparing the distance between the spectral confocal sensor and the stage plane collected at different position points above the stage plane.

[0081] Step S620: For any position point on the moving path, obtain a third height value of the spectral confocal sensor from the glass substrate before coating.

[0082] In the embodiment of the present application, when the spectral confocal sensor detects a glass substrate, a specially designed dispersion objective lens is used to focus complex light containing multiple wavelengths on the optical axis in an increasing or decreasing manner of wavelength, forming a series of continuous measurement points. The focused light waves on the surface of the glass substrate are then detected by the spectral confocal sensor spectrometer, which is then converted into corresponding height information. At this time, the height from the spectral confocal sensor to the surface of the glass substrate is measured as H2, so that the thickness of the glass can be obtained.

[0083] This application uses a spectral confocal sensor to measure glass thickness and other data. Compared with the laser ranging sensor that emits laser to the surface of the glass substrate, when the laser encounters the glass surface, part of the light is reflected back, forming an interference phenomenon. By analyzing the interference pattern, the distance between the laser and the glass surface is accurately calculated. The spectral confocal sensor can also realize absolute length measurement, with the highest measurement resolution reaching nanometers and the measurement accuracy maintained at tens of nanometers. It provides a new measurement method for surface morphology, workpiece thickness, roughness, and transparent material thickness measurement, and can measure the flatness of the glass surface, thereby obtaining the parallelism of the glass surface and the die lip surface.

[0084] In the embodiment of the present application, for any position point on the die travel path, the third height value (i.e., H2) of the spectral confocal sensor from the glass substrate at the position point is measured by the spectral confocal sensor disposed on the front side of the die beam when the sensor passes the position point for the first time.

[0085] In an embodiment of the present application, the fourth height value (i.e., H3) of the spectral confocal sensor from the position point of the glass substrate can be measured by the spectral confocal sensor arranged on the rear side of the die beam after the die has coated the position point. In this process, the die only needs to move once to obtain the third height value and the fourth height value respectively using the spectral confocal sensors on the front and rear sides.

[0086] In another embodiment of the present application, the fourth height value (i.e., H3) of the spectral confocal sensor from the position point of the glass substrate can also be obtained by the spectral confocal sensor only arranged on the front side of the die beam passing through the position point again after coating. In this process, the die needs to move twice to obtain the third height value and the fourth height value respectively.

[0087] Step S630, determining a first coating control parameter of the position point based on the first height value, the second height value, the third height value and the configured target thickness value; based on the first coating control parameter, controlling the die head to coat the position point of the glass substrate when passing through the position point for the first time.

[0088] In the embodiment of the present application, the coating control parameters include a die height control parameter and a die parallelism control parameter; specifically, the die height control parameter is used to control the height of the die lifting; the die parallelism control parameter is used to control the position and angle of the die.

[0089] In the embodiment of the present application, the configured target thickness value is the preset final desired slurry thickness value.

[0090] In an embodiment of the present application, based on the first height value, the second height value, the third height value and the configured target thickness value, determining the first coating control parameter of the position point includes:

[0091] The difference between the first height value and the third height value is taken as the thickness of the glass substrate at that position, such as Figure 7 Act; taking the absolute value of the difference between the second height value and the thickness of the glass substrate at the position as the thickness difference;

[0092] If the second height value is not greater than the thickness of the glass substrate at the position, determining the die height control parameter at the position based on the sum of the second height value, the thickness difference value and the target thickness value;

[0093] If the second height value is greater than the thickness of the glass substrate at the position, the die height control parameter at the position is determined based on the sum of the difference between the second height value and the thickness difference value and the target thickness value.

[0094] In the embodiment of the present application, the die height and coating thickness correspondence table can be pre-configured, and the die height can be matched from the correspondence table according to the corresponding height value. When coating for the first time, the user can input the configured coating thickness value, and the processor generates a coating control parameter according to the input configured coating thickness value, and controls the die head to rise and fall to reach the configured coating thickness value based on the coating control parameter, and then coats the glass substrate.

[0095] In an embodiment of the present application, after controlling the die head to coat the position point of the glass substrate when passing through the position point for the first time, the method further includes:

[0096] For any position point in the traveling direction, a fourth height value of the spectral confocal sensor from the slurry coated at the position point is obtained when the spectral confocal sensor is at the position point after coating; the difference between the third height value and the fourth height value is used as the actual coating thickness; based on the difference between the actual coating thickness and the target thickness value, a second coating control parameter of the position point is determined; based on the second coating control parameter, the die head is controlled to re-coat the position point when it passes through the position point for the second time.

[0097] During the coating process, the spectral confocal sensor detects the third height value and the fourth height value of each position point in the traveling direction before and after coating, and determines whether there are defects in the coating by analyzing the third height value and the fourth height value of each position point; if there are defects in the coating, it is necessary to control the die head to return to the position point of the defect for re-coating, that is, to carry out targeted re-coating for the position points where the coating thickness does not meet the requirements.

[0098] In the embodiments of the present application, whether there are defects in coating includes: thickness failure and parallelism defect; thickness failure means that the actual coating thickness at a certain position after coating does not reach the configured coating thickness. If it does not reach the configured coating thickness, a coating control parameter can be generated according to the difference between the actual coating thickness and the configured target coating thickness, so as to control the die head to perform re-coating on the position point; parallelism defect means that the surface parallelism of the glass substrate after coating does not meet the requirements or the surface parallelism of the original glass substrate does not meet the requirements (for example, the thickness of each position point of the whole glass substrate is different); the surface parallelism of the original glass substrate does not meet the requirements, which can be compensated by applying different thicknesses of slurry to different positions before coating; if the surface parallelism of the glass substrate after coating does not meet the requirements, it is necessary to re-coat the already coated glass substrate, or it can be compensated by adjusting the position or angle of the die head.

[0099] In the embodiment of the present application, the parallelism between the lip and the glass substrate is determined based on the third height value of each position point of the glass substrate in the traveling direction; and the die parallelism control parameter is generated based on the parallelism between the lip and the glass substrate.

[0100] In the embodiment of the present application, the parallelism between the lip and the glass substrate is determined based on the third height value of each position point of the glass substrate in the traveling direction, including:

[0101] If the difference between the third height value of each position point and the third height value of other position points is very close (i.e., it does not exceed the preset difference threshold), it can be considered that the die lip is parallel to the glass surface; otherwise, it is considered that the die lip is not parallel to the glass surface.

[0102] In the embodiment of the present application, if the die lip is not parallel to the glass surface, the position or angle of the die can be adjusted or the concave portion can be re-coated so that the glass substrate after final coating meets the requirements.

[0103] In the embodiment of the present application, based on the parallelism between the lip and the glass substrate, the die parallelism control parameters are generated, including:

[0104] Determine the target re-coating thickness based on the difference between the third height value of any position point and the third height values ​​of other position points and / or the third height value and the third height value of other position points, and generate the die parallelism control parameters based on the target re-coating thickness; or, determine the die parallelism control parameters based on the difference between the third height value of any position point and the third height values ​​of other position points and a pre-configured height difference and position or angle control parameter comparison table.

[0105] In another embodiment of the present application, if it is desired that the slurry on the surface of the glass substrate maintains good parallelism after coating, targeted re-coating can be performed based on the difference between the actual coating thicknesses at various positions of the glass substrate so that the upper surface of the slurry after coating has good parallelism. The specific steps include:

[0106] Based on the difference between the actual coating thickness at any position point and the actual coating thickness at other position points and / or the actual coating thickness and the actual coating thickness at other position points, the target re-coating thickness is determined, and based on the target re-coating thickness, the die parallelism control parameters are generated; or, the die parallelism control parameters are determined according to the difference between the actual coating thickness at any position point and the actual coating thickness at other position points and a pre-configured thickness difference and position or angle control parameter comparison table.

[0107] In one embodiment of the present application, the die coating control method may adopt the following steps:

[0108] When the gantry moves toward the glass to the same vertical direction as the die and the contact digital sensor, the contact digital sensor will send out a sensing signal, and the die will slowly descend until the die lip just contacts the sensor contact piece and stops descending. At this time, the digital sensor measures the parallelism between the die lip surface and the contact piece surface and locates the height of the die lip at this time (initial value H). At this time, the height from the die lip to the carrier plane is obtained. At the same time, the spectral confocal sensor measures the flatness of the carrier and the height from the spectral confocal sensor to the carrier plane (initial value H1). The obtained initial value H1 is used as a fixed value, and there is no need to use the contact digital sensor afterwards.

[0109] After the measurement, the gantry continues to move toward the glass. When the spectral confocal sensor detects the glass, a specially designed dispersion objective is used to focus the complex light containing multiple wavelengths on the optical axis in an increasing or decreasing manner, forming a series of continuous measurement points. The focused light waves on the glass surface are then detected by a spectrometer and converted into corresponding height information. At this time, the height from the spectral confocal sensor to the glass surface is measured as H2, and the thickness of the glass can be obtained.

[0110] like Figure 7 As shown in the figure, when it is necessary to apply slurry on the glass surface of standard thickness, the thickness of the glass is recorded as Act value, Act = H1-H2. There is no need to measure the thickness of the glass separately. Slurries of different thicknesses are applied on the glass surface, and the slurry thickness is recorded as GAP value. During the coating process, the spectral confocal sensor located on the rear side of the die beam measures its height from the slurry surface (i.e., the top surface of the wet film) as H3. Therefore, GAP = H2-H3. After setting the detection range of the spectral confocal sensor and the glass surface, you only need to enter the GAP value, and the die will start to automatically rise and fall according to the following procedure:

[0111]

[0112] Wherein, H represents the second height value; Act represents the thickness of the glass substrate at any position point, that is, the difference between the first height value and the third height value at the position point; GAP represents the configured target thickness value; H c Indicates the target height of the lip during coating.

[0113] When it reaches the detection range, it will slowly rise and fall until the GAP value is reached. If there is a thickness difference in the glass after coating, the die head can also perform precise re-coating to ensure that the coating thickness of each part can guarantee the GAP value. The recording results of the coating process are as follows Figure 8 As shown in the figure, it can be seen that there is a micron-level thickness difference at different locations of the glass. This is difficult to achieve with traditional distance measuring devices.

[0114] When coating begins, the gantry moves forward, and the spectral confocal sensor arranged on the front side of the die beam is responsible for measuring the thickness of the glass. The measured data is analyzed, and the die performs precise coating based on the analyzed data. The spectral confocal sensor arranged on the rear side of the die beam is responsible for measuring the thickness of the slurry after the die is coated, which can quickly test the coating uniformity and quickly and accurately detect the coating defect position. When the die coating is completed, the spectral confocal sensor transmits the measured slurry thickness information. After data analysis, when the gantry returns backward, the die performs a second precise coating on the coating defect position until the gantry returns to its original position, and the complete coating process is completed. This device not only greatly saves the time for detecting coating uniformity, but also improves the convenience and operability of coating, reduces the complexity of the equipment, and saves equipment costs.

[0115] Corresponding to the above method, the present application embodiment also provides a die coating control system, such as Fig. 9 As shown, the die coating control system includes:

[0116] An acquisition unit 910 is used to acquire a first height value of the spectral confocal sensor from the stage plane, and a second height value of the lip when the lip is in contact with the contact member;

[0117] The control unit 920 is used to control the gantry to drive the die head and the spectral confocal sensor to move forward along the moving direction of the die head;

[0118] The measuring unit 930 is used to obtain, for any position point in the traveling direction, a third height value of the spectral confocal sensor from the glass substrate before coating;

[0119] The coating unit 940 is used to determine the first coating control parameter of the position point based on the first height value, the second height value, the third height value and the configured target thickness value; based on the first coating control parameter, control the die head to coat the position point of the glass substrate when it passes through the position point for the first time.

[0120] The functions of each functional unit of the die coating control system provided in the above embodiments of the present application can be realized through the above-mentioned method steps. Therefore, the specific working process and beneficial effects of each unit in the die coating control system provided in the embodiments of the present application will not be repeated here.

[0121] The present application also provides an electronic device, such as Fig.10 As shown, it includes a processor 1010 , a communication interface 1020 , a memory 1030 and a communication bus 1040 , wherein the processor 1010 , the communication interface 1020 , and the memory 1030 communicate with each other via the communication bus 1040 .

[0122] Memory 1030, used for storing computer programs;

[0123] The processor 1010 is used to implement the following steps when executing the program stored in the memory 1030:

[0124] Acquire a first height value of the spectral confocal sensor from the stage plane, and a second height value of the lip when the lip contacts the contact member;

[0125] Controlling the gantry to drive the die head and the spectral confocal sensor to move forward along the moving direction of the die head;

[0126] For any position point in the traveling direction, obtaining a third height value of the spectral confocal sensor from the glass substrate before coating;

[0127] Based on the first height value, the second height value, the third height value and the configured target thickness value, the first coating control parameter of the position point is determined; based on the first coating control parameter, the die head is controlled to coat the glass substrate at the position point when it passes through the position point for the first time.

[0128] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0129] The communication interface is used for communication between the above electronic device and other devices.

[0130] The memory may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0131] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0132] The implementation methods and beneficial effects of the components of the electronic device in the above embodiments to solve the problems can be seen in Figure 6 The various steps in the illustrated embodiment are implemented, therefore, the specific working process and beneficial effects of the electronic device provided by the embodiment of the present application are not repeated here.

[0133] In another embodiment provided in the present application, a computer-readable storage medium is provided, in which instructions are stored. When the computer-readable storage medium is run on a computer, the computer executes the die coating control method of any one of the above embodiments.

[0134] In another embodiment provided in the present application, a computer program product including instructions is also provided, which, when executed on a computer, enables the computer to execute any of the die coating control methods in the above embodiments.

[0135] Those skilled in the art will appreciate that the embodiments in the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt a complete hardware embodiment, a complete software embodiment, or a form of an embodiment combining software and hardware. Moreover, the present application may adopt a form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0136] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0137] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0138] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0139] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0140] Obviously, those skilled in the art can make various changes and modifications to the embodiments in the present application without departing from the spirit and scope of the embodiments in the present application. Thus, if these modifications and variations of the embodiments in the present application fall within the scope of the claims and their equivalents in the embodiments of the present application, the embodiments of the present application are also intended to include these modifications and variations.

Claims

1. A die coating control device, characterized in that: The die coating control device comprises: a carrier, two gantry seats, a first connecting plate and a second connecting plate; a glass substrate is placed on the carrier plane of the carrier; the gantry seat and the carrier are located in the same plane; A lifting device is provided in each of the two gantry seats; the lifting devices of the two gantry seats are connected to the first connecting plate; the first connecting plate is perpendicular to the plane of the carrier; The second connecting plate comprises a first vertical plate and a second vertical plate which are perpendicular to each other; the first connecting plate is fixedly connected to the first vertical plate; A die beam is fixed between the second vertical plates corresponding to the two gantry seats; a die head is fixed below the die beam; and the die head is perpendicular to the glass substrate; The gantry is used to drive the die head to move along one side of the carrier plane to another side opposite to the side, so that the die head completes coating the glass substrate; the front side of the die head in the moving direction is regarded as the front side; A spectral confocal sensor is fixed on the front side of the die beam; the spectral confocal sensor is perpendicular to the carrier plane; A contact digital sensor is arranged on the rear side of the carrier; the contact digital sensor is perpendicular to the plane of the carrier.

2. The device according to claim 1, characterized in that A lip is provided below the die head; The contact element at the top of the contact digital sensor is higher than the plane of the carrier.

3. A die coating control method applied to the die coating control device as claimed in any one of claims 1 to 2, characterized in that: The method comprises: Acquire a first height value of the spectral confocal sensor from the stage plane, and a second height value of the lip when the lip contacts the contact member; Controlling the gantry to drive the die head and the spectral confocal sensor to move forward along the moving direction of the die head; For any position point in the traveling direction, obtaining a third height value of the spectral confocal sensor from the position point of the glass substrate before coating; Determining a first coating control parameter of the location point based on the first height value, the second height value, the third height value and a configured target thickness value; Based on the first coating control parameter, the die head is controlled to coat the position point of the glass substrate when it passes through the position point for the first time.

4. The method according to claim 3, characterized in that The coating control parameters include die height control parameters; Determining a first coating control parameter of the position point based on the first height value, the second height value, the third height value and a configured target thickness value includes: Using the difference between the first height value and the third height value as the thickness of the glass substrate at the position; Taking the absolute value of the difference between the second height value and the thickness of the glass substrate at the position point as the thickness difference; If the second height value is not greater than the thickness of the glass substrate at the position point, a die height control parameter of the position point is determined based on the sum of the second height value, the thickness difference value and the target thickness value.

5. The method according to claim 4, characterized in that The method further comprises: If the second height value is greater than the thickness of the glass substrate at the position point, a die height control parameter of the position point is determined based on the sum of the difference between the second height value and the thickness difference value and the target thickness value.

6. The method according to claim 3, characterized in that After controlling the die head to coat the position point of the glass substrate when passing through the position point for the first time, the method further includes: For any position point in the traveling direction, obtaining a fourth height value of the spectral confocal sensor from the slurry coated at the position point when the spectral confocal sensor is at the position point after coating; Taking the difference between the third height value and the fourth height value as the actual coating thickness; Determining a second coating control parameter of the position point based on a difference between the actual coating thickness and the target thickness value; Based on the second coating control parameter, the die head is controlled to perform re-coating on the position point when passing through the position point for the second time.

7. The method according to claim 3, characterized in that The coating control parameters also include: die parallelism control parameters; The method further comprises: Determining the parallelism between the lip and the glass substrate based on a third height value of each position of the glass substrate in the traveling direction; Based on the parallelism between the lip and the glass substrate, a die parallelism control parameter is generated.

8. A die coating control system, characterized in that: The system comprises: An acquisition unit, used for acquiring a first height value of the spectral confocal sensor from the stage plane, and a second height value of the lip when the lip is in contact with the contact member; A control unit, used for controlling the gantry to drive the die head and the spectral confocal sensor to move forward along the traveling direction of the die head; A measuring unit, for obtaining a third height value of the spectral confocal sensor from the glass substrate before coating at any position point in the traveling direction; The coating unit is used to determine a first coating control parameter of the position point based on the first height value, the second height value, the third height value and the configured target thickness value; based on the first coating control parameter, control the die head to coat the position point of the glass substrate when it passes through the position point for the first time.

9. An electronic device, characterized in that: The electronic device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory, used to store computer programs; A processor, for implementing any of the methods described in claims 3-7 when executing a program stored in a memory.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 3 to 7 is implemented.

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