A manufacturing method of a temperature-sensing computer keyboard touchpad glass

Abstract

The present invention relates to the technical field related to touchpads, and particularly to a manufacturing method for a temperature-sensing computer keyboard touchpad glass. The method includes: Step 1, performing preliminary preparation processing on a glass substrate, including CNC machining, cleaning and quality inspection, tempering treatment, ultrasonic cleaning, drying and quality inspection, BM ink screen printing, baking, cleaning, and quality inspection; Step 2, adjusting the process of temperature-sensing ink screen printing on the glass substrate, which is divided into the first printing stage, the second printing stage, and the third printing stage. In each stage, image acquisition is performed through a CCD alignment mechanism, and the offset situation in each stage is analyzed to determine the placement position of the screen template in the subsequent printing stage, or, an offset alarm is given; Step 3, performing AF liquid coating treatment, cleaning, quality inspection, and packaging and warehousing on the glass substrate. The present invention improves production efficiency through precise alignment, ensures the stability and consistency of printing quality, and has high practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of touchpads, and particularly to a manufacturing method of a temperature-sensing computer keyboard touchpad glass. Background Art

[0002] In the process of preparing traditional touchpads, it usually includes steps such as CNC (Computer Numerical Control) machining, cleaning and quality inspection, tempering treatment, cooling, ultrasonic cleaning, rinsing, drying and quality inspection, and then processes such as screen printing and baking. However, there are certain deficiencies in the position accuracy control during the printing process of traditional methods, which easily lead to the offset of printed patterns, affecting product quality and the yield rate.

[0003] Chinese Patent Publication No.: CN102501657B discloses a screen printing alignment method. By pasting a transparent film on the encapsulation substrate, first printing the liquid ink through screen printing onto the transparent film, observing whether the liquid ink on the transparent film is aligned with the printed pattern or printed circuit on the encapsulation substrate. If not aligned, then paste a new transparent film and adjust the position of the screen until it is determined that the alignment is successful and then screen print on the encapsulation substrate. This method still has problems such as a cumbersome printing process and inaccurate alignment of the screen template in practical applications. Summary of the Invention

[0004] Therefore, the present invention provides a manufacturing method of a temperature-sensing computer keyboard touchpad glass to overcome the problems of a cumbersome screen template printing process and inaccurate alignment in the prior art.

[0005] A manufacturing method of a temperature-sensing computer keyboard touchpad glass that can make the temperature-sensitive color-changing ink evenly coated, includes the following steps.

[0006] Step 1, perform preliminary preparation treatment on the glass substrate, including first performing CNC machining, cleaning and quality inspection, then performing tempering treatment and cooling, then removing the cleaning agent through ultrasonic cleaning and rinsing and drying and quality inspection, and finally performing BM (Black Matrix) ink screen printing, baking, cleaning and quality inspection on the glass substrate.

[0007] Step 2, adjust the screen printing process of the temperature-sensitive ink on the glass substrate that has undergone the preliminary preparation treatment, which is divided into three stages: the first printing stage, the second printing stage, and the third printing stage. In each stage, based on the acquisition of the printed image and the position comparison and analysis, the placement position of the next screen template is re-determined based on the analysis result.

[0008] Step 3: Perform AF (Anti-Fingerprint) liquid coating treatment and cleaning on the glass substrate to form a finished touch panel glass, and conduct final quality inspection and packaging and warehousing for the finished product.

[0009] Further, in the first printing stage, the placement position of the first silk screen template is determined according to a preset first standard point.

[0010] Further, after the first printing stage is completed, by collecting and analyzing the image of the first pattern, the position of the first actual point is obtained, and it is compared with the preset first standard point position for position comparison and analysis to determine the placement position of the silk screen template in the second printing stage. The first actual point position is the center point position of the first pattern, the preset first standard point is the reference point set in the first printing stage for determining the placement position of the first silk screen template, and the first pattern is the pattern collected by the CCD (Charge-Coupled Device) alignment mechanism after the first printing is completed.

[0011] Further, in the second printing stage, for those that need to adjust the placement position of the silk screen template, the second standard point is determined according to the relationship between the first standard point position and the first actual point position, and the placement position of the second silk screen template is determined with the second standard point.

[0012] Further, in the second printing stage, when determining the placement position of the second silk screen template according to the relationship between the first standard point position and the first actual point position, the controlled horizontal offset distance and vertical offset distance are less than the offset distance in the relationship between the first standard point position and the first actual point position, and a horizontal offset distance ratio parameter and a vertical offset distance ratio parameter are set during the offset process. The offset distance is the offset distance between the actual point and the standard point, the actual point is the center point of the actually formed pattern after printing, and the standard point is the reference point for determining the placement position of the silk screen template.

[0013] Further, in the third printing stage, the third standard point is determined by analyzing the target point and the relationship between the actual points and the standard points in the first printing stage and the second printing stage, and the placement position of the third silk screen template is determined with the third standard point.

[0014] The standard point is the reference point for determining the placement position of the silk screen template, and the actual point is the center point of the actually formed pattern after printing.

[0015] Further, the target point is determined by analyzing the first actual point position and the second actual point position.

[0016] Further, different silk screen printing templates are selected in the three printing stages.

[0017] Further, in the three printing stages, different temperature-sensitive color-changing inks are selected respectively.

[0018] Further, in the three printing stages, image acquisition is performed on the printed pattern, the actual point position and the standard point position are obtained, and the acquired data is compared and analyzed. An alarm is given for those that do not meet the offset error range.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0020] In the first printing stage, the position of the glass substrate is accurately identified by starting the CCD alignment mechanism, and the initial standard point position is determined, and then the placement position of the first screen template is determined. The implementation of this innovative technical solution effectively avoids the position deviation caused by manual positioning in the traditional printing process, greatly improves the printing accuracy, and thus achieves remarkable improvements in productivity and product quality.

[0021] Further, through image acquisition and analysis of the first pattern, the first actual point position is obtained, and it is compared and analyzed with the preset first standard point position. The setting of this technical step makes the printing process more refined and accurate. By obtaining the horizontal offset distance, vertical offset distance, and linear offset distance, it further guides the placement position of the second screen template in the second printing stage, ensuring the stability and consistency of the printing quality.

[0022] Further, the present invention optimizes the template placement position by introducing and analyzing the concepts of horizontal offset distance, vertical offset distance, and linear offset distance, ensuring the accuracy and aesthetics of the printed pattern. At the same time, when the offset exceeds the preset range, the system can give an alarm in time, thus avoiding the production of defective products caused by inaccurate printing positions and saving production costs.

[0023] In the second printing stage, through the analysis of the horizontal offset distance, vertical offset distance, and linear offset distance in the first printing stage, the accurate adjustment of the placement position of the screen template in the second printing stage is carried out, ensuring the printing quality and greatly improving the printing accuracy and efficiency. This technical means based on the adjustment of the actual offset distance effectively controls the position error in the printing process, and thus significantly improves the printing quality, especially suitable for occasions with extremely high requirements for printing quality.

[0024] Furthermore, by using the method of the present invention to determine the placement position of the second screen template, assuming that 90% of the actual offset distance is selected as the adjustment value, the position error is effectively reduced, and the printing stability is improved. After the second printing is completed, by comparing and analyzing the center point position of the second pattern with the second standard point position, the accuracy of the placement position of the third screen template in the third printing stage is ensured.

[0025] In the third printing stage, the third standard point is determined through data analysis of the previous two printing stages, and the CCD alignment mechanism is used for precise position recognition, which can accurately determine the standard point of the third printing, greatly improving the position accuracy in the printing process and effectively avoiding printing quality problems caused by position deviation. And the placement position of the third screen template is determined according to the position of the third standard point, which ensures the integrity and consistency of the pattern and avoids pattern misalignment or missing caused by position deviation.

[0026] Furthermore, after the third printing stage is completed, image acquisition and analysis are performed on the printed pattern to obtain the center point position of the third pattern T3, and a position comparison and analysis are carried out with the third target point position. This step not only verifies the accuracy of the printing position but also provides feedback for the subsequent printing process for further adjustment and optimization.

[0027] Furthermore, through the precise measurement and adjustment of position offset during the three printing processes, the precise alignment of the thermochromic ink pattern is achieved, effectively eliminating the position deviation in the printing process, ensuring the accuracy and consistency of the pattern, and thus significantly improving the quality and appearance of the product.

[0028] Furthermore, the present invention selects different screen printing templates and thermochromic inks in the three printing stages respectively, which not only improves the printing efficiency but also makes the printing effect more diverse, meeting the needs of different users for touch panel glass.

[0029] Furthermore, the present invention reduces the need for manual intervention and improves production efficiency by introducing automated equipment and precise measurement techniques. At the same time, through the real-time monitoring and offset alarm system, the printing position is adjusted in a timely manner, reducing the scrap rate and further improving the production efficiency.

[0030] Furthermore, the present invention further optimizes the template placement position by introducing the concepts of horizontal offset distance, vertical offset distance, and linear offset distance and analyzing them, ensuring the accuracy and aesthetics of the printed pattern. At the same time, when the offset exceeds the preset range, the system can issue an alarm in a timely manner, thus avoiding the generation of scrap caused by inaccurate printing position and saving production costs.

[0031] Furthermore, after the third printing is completed, the present invention performs image acquisition and analysis on the printed pattern, obtains the center point position of the third pattern, and conducts a position comparison and analysis with the third standard point position. This step not only verifies the accuracy of the printing position but also provides feedback for the subsequent printing process for further adjustment and optimization.

[0032] Furthermore, the present invention selects different screen printing templates and temperature-sensitive color-changing inks in three printing stages, which not only improves the aesthetics of the product, making the printing effect more rich and diverse, but also endows the product with a temperature sensing function, enabling users to obtain different visual feedback according to the temperature change of the touchpad when using the computer keyboard, meeting the needs of different users for the touchpad glass, and enhancing the interactivity and user experience of the product.

[0033] Furthermore, through the precise measurement and adjustment of position offset during the three printing processes, the present invention achieves the precise alignment of the temperature-sensitive color-changing ink pattern, effectively eliminates the position deviation during the printing process, ensures the accuracy and consistency of the pattern, and thus significantly improves the quality and appearance of the product.

[0034] Furthermore, by introducing automated equipment and precise measurement techniques, the present invention reduces the need for manual intervention. At the same time, through real-time monitoring and offset alarm systems, the printing position is adjusted in a timely manner, reducing the scrap rate and further improving production efficiency.

[0035] Furthermore, by optimizing the process flow and improving production efficiency, the present invention reduces production costs while ensuring product quality. Precise printing technology reduces material waste, and automated equipment reduces labor costs, overall improving the economic efficiency of production.

[0036] In summary, through a printing positioning method with a different technical concept, the present invention greatly improves the product quality during the production process of the temperature-sensing computer keyboard touchpad glass, represents a new development trend of screen printing technology, and provides new ideas for technological innovation and development in this field. The present invention demonstrates significant beneficial effects in terms of functionality, production precision, quality control, safety, environmental adaptability, cost savings, and technological development trends, and has high practical value and market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a process flow chart of an embodiment of the manufacturing method of a temperature-sensing computer keyboard touchpad glass according to the present invention;

[0038] Figure 2 It is a flow chart for determining the placement position of the second screen template in an embodiment of the present invention;

[0039] Figure 3 It is a flowchart for confirming the relationship between actual points and standard points in the embodiments of the present invention;

[0040] Figure 4 It is a schematic structural diagram of a screen printing machine tool in the embodiments of the present invention;

[0041] Figure 5 It is a top view of a printing workbench and a glass substrate in the embodiments of the present invention;

[0042] Figure 6 It is a schematic diagram of the first printing stage in the embodiments of the present invention;

[0043] Figure 7 It is a schematic diagram of the second printing stage in the embodiments of the present invention;

[0044] Figure 8 It is a schematic diagram of the third printing stage in the embodiments of the present invention; [[ID=2X]]

[0045] Figure 9 It is a schematic diagram of points in a rectangular coordinate system in the embodiments of the present invention. Detailed implementation manners

[0046] In order to make the objectives and advantages of the present invention more clear and understandable, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0048] It should be noted that in the description of the present invention, the terms indicating directions or relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0049] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0050] Please refer to Figures 1-9 as shown,Figure 1 Process flow chart of an embodiment of the manufacturing method of a temperature-sensing computer keyboard touchpad glass according to the present invention; Figure 2 Flow chart for determining the placement position of the second screen template in an embodiment of the present invention; Figure 3 Flow chart for confirming the relationship between the actual points and the standard points in an embodiment of the present invention; Figure 4 Schematic structural diagram of a screen printing machine tool in an embodiment of the present invention; Figure 5 Top view of the printing workbench and the glass substrate in an embodiment of the present invention; Figure 6 Schematic diagram of the first printing stage in an embodiment of the present invention; Figure 7 Schematic diagram of the second printing stage in an embodiment of the present invention; Figure 8 Schematic diagram of the third printing stage in an embodiment of the present invention; Figure 9 Schematic diagram of points in a rectangular coordinate system in an embodiment of the present invention.

[0051] The present invention provides a manufacturing method for a temperature-sensing computer keyboard touchpad glass, comprising the following steps.

[0052] Step 1: Perform preliminary preparation treatment on the glass substrate L, including first performing CNC machining, cleaning and quality inspection, then performing tempering treatment and cooling, then removing the cleaning agent by ultrasonic cleaning and rinsing and drying and quality inspection, and finally performing BM ink screen printing, baking, cleaning and quality inspection on the glass substrate L;

[0053] Step 2: Perform screen printing of temperature-sensitive ink on the glass substrate L that has undergone preliminary preparation treatment;

[0054] Step 3: Perform AF liquid coating treatment, cleaning, quality inspection and packaging and warehousing on the glass substrate.

[0055] Step 2 specifically includes the following three stages:

[0056] In the first printing stage, the glass substrate L is conveyed to the printing workbench 2 through the feeding area 1, the glass substrate L is fixed on the printing workbench 2, the CCD alignment mechanism 3 is started to identify the position of the glass substrate L, and the initial standard point position and the preset first standard point position on the glass substrate L are obtained. The placement position of the first screen template is determined through the first standard point position, the temperature-sensitive color-changing ink A is coated on the first screen template with a circular pattern having a diameter of , the printing main body 5 descends, the screen is brought into contact with the glass substrate L, pressure is applied by the squeegee 4, and the ink is transferred to the substrate through the first screen to form a circular pattern T1 with a diameter of , the glass substrate L on the workbench 2 is taken off, and it is baked, cleaned and quality inspected.

[0057] After the first printing is completed, the CCD alignment mechanism 3 performs image acquisition and analysis on the first pattern generated by the first screen template printing, obtains the center point position of the first pattern, sets it as the first actual point position, and performs position comparison and analysis between the first actual point position and the preset first standard point position to determine the placement position of the second screen template in the second printing stage, or, issue an offset alarm. The content of the comparison and analysis includes,

[0058] Obtain the horizontal offset distance ΔX1 between the first actual point position S1 and the preset first standard point position M1;

[0059] Obtain the vertical offset distance ΔY1 between the first actual point position S1 and the preset first standard point position M1;

[0060] Obtain the linear offset distance ΔP1 between the first actual point position S1 and the preset first standard point position M1.

[0061] In this embodiment, it is set that the glass substrate L is 160mm×100mm, the initial standard point of the glass substrate L is M0, the initial standard point M0 is the lower left corner vertex of the glass substrate L, the first standard point M1 is the geometric center point of the glass substrate L, and the first actual point position S1 is the geometric center point of the first pattern. In an ideal situation, the first standard point M1 coincides with the first actual point position S1.

[0062] Corresponding offset error ranges are respectively set for the horizontal offset distance ΔX1, the vertical offset distance ΔY1, and the linear offset distance ΔP1. If any of the horizontal offset distance ΔX1, the vertical offset distance ΔY1, and the linear offset distance ΔP1 exceeds the corresponding error range, an alarm is issued; if all of the horizontal offset distance ΔX1, the vertical offset distance ΔY1, and the linear offset distance ΔP1 are within the corresponding error ranges, the placement position of the second screen template is determined.

[0063] Determination includes adjustment and non - adjustment. ΔP1 is compared with the preset range. For ΔP1 within the preset range, it is determined not to adjust, and for ΔP1 not within the preset range, it is determined to adjust.

[0064] In the first printing stage, by starting the CCD alignment mechanism 3, the position of the glass substrate L is accurately identified, the initial standard point position is determined, and then the placement position of the first screen template is determined. The implementation of this innovative technical solution effectively avoids the position deviation caused by manual positioning in the traditional printing process, greatly improves the printing accuracy, and thus achieves remarkable improvements in productivity and product quality.

[0065] After the first printing is completed, the CCD alignment mechanism 3 acquires and analyzes the image of the first pattern, obtains the position of the first actual point, and conducts a position comparison and analysis with the preset position of the first standard point. The setting of this technical step makes the printing process more refined and accurate. By obtaining the horizontal offset distance ΔX1, vertical offset distance ΔY1, and linear offset distance ΔP1, it further guides the placement position of the second screen template in the second printing stage, ensuring the stability and consistency of the printing quality.

[0066] In addition, the present invention also sets an offset error range, alarms for values that do not meet the error range, effectively prevents the expansion of printing errors, further guarantees the printing quality, simplifies the printing process, and improves production efficiency.

[0067] For the situation where it is determined that the placement position of the second screen template needs to be adjusted, the value of the second standard point M2 is determined through the relationship between the first standard point M1 and the position of the first actual point S1, and the placement position of the second screen template is determined through the value of the second standard point M2.

[0068] As an embodiment, assume that in a plane rectangular coordinate system, M0=(0,0), the first standard point M1=(80,50), and the first actual point S1=(72,45). Then ΔX1=-8 and ΔY1=-5; the horizontal offset distance ratio parameter and vertical offset distance ratio parameter of the second actual point are both set to 0.9. When determining the placement position of the second screen template, 90% of the actual offset distance is selected as the adjustment value. Then, in the second printing, the second standard point M2=(79.2,49.5).

[0069] In the second printing stage, for those that need to adjust the placement position of the second screen template, the placement position of the second screen template is determined by the second standard point M2. The CCD alignment mechanism 3 is activated to identify the position of the glass substrate L. The third screen template is placed according to the value of the second standard point M2. The temperature-sensitive color-changing ink B is coated on the second screen template with a circular pattern having a diameter of 10 mm. The printing host 5 descends to make the screen contact the glass substrate L. Pressure is applied through the squeegee 4 to transfer the ink through the screen onto the substrate, forming a circular pattern T2 with a diameter of 10 mm. The glass substrate L on the workbench 2 is removed and subjected to baking, cleaning, and quality inspection.

[0070] In the second printing stage, the second standard point is determined by setting the horizontal offset distance ratio parameter and vertical offset distance ratio parameter of the second actual point, and the second printing is carried out. After the second printing is completed, the third standard point is determined by analyzing the relationship between the target point and the actual points and standard points in the previous two printing stages.

[0071] After the second printing is completed, there are two cases. In the first case, the offset between the second actual point and the second standard point is equal to the offset between the first actual point and the first standard point. In the second case, the offset between the second actual point and the second standard point is not equal to the offset between the first actual point and the first standard point.

[0072] For the first case, when the offset between the second actual point and the second standard point is equal to the offset between the first actual point and the first standard point, the standard point in the third printing stage can be directly determined according to the third target point. As an example, given that the first standard point M1 = (80, 50), the first actual point S1 = (72, 45), ΔX1 = -8, ΔY1 = -5, and 90% of the actual offset distance is selected as the adjustment value, the second standard point M2 = (79.2, 49.5). Image acquisition and analysis are performed on the second pattern generated by printing through the second screen template to obtain the center point position of the second pattern and set it as the second actual point position S2. Assuming the second actual point position S2 = (71.2, 44.5), then ΔX2 = -8, ΔY2 = -5. The two offsets are compared and analyzed. At this time, the two offsets are equal, and it is determined that the offset between the actual point and the standard point is affected by a single factor, and the offset between the actual point and the standard point is a fixed value. When setting the third printing target point to be the midpoint between the first actual point and the second actual point, the third target point is (71.6, 44.75), and then the third standard point M3 = (79.6, 49.75).

[0073] For the second case, the offset between the second actual point and the second standard point is not equal to the offset between the first actual point and the first standard point. There is a situation where the X and Y values of the actual point position are in the same proportional relationship with the X and Y values of the standard point position. As an example, given the first standard point M1 = (80, 50), the first actual point S1 = (72, 45), ΔX1 = -8, ΔY1 = -5. At this time, S1x = 0.9×M1x, S1y = 0.9×M1y. Select 90% of the actual offset distance as the adjustment value. The second standard point M2 = (79.2, 49.5). Image acquisition and analysis are performed on the second pattern generated by the second screen printing template to obtain the center point position of the second pattern and set it as the second actual point position S2. Assume the second actual point position S2 = (71.28, 44.55), then ΔX2 = -7.92, ΔY2 = -4.95. Comparative analysis is performed on the two offsets. At this time, the two offsets are not equal, but at this time S2x = 0.9×M2x, S2y = 0.9×M2y. It is determined that the X and Y values of the actual point position are in the same proportional relationship with the X and Y values of the standard point position. When setting the third printing target point as the middle of the first actual point and the second actual point, the third target point is S3(71.64, 44.775), S3x = 0.9×M3x, S3y = 0.9×M3y, then the third standard point M3 is (79.6, 49.75).

[0074] For the second case, the offset between the second actual point and the second standard point is not equal to the offset between the first actual point and the first standard point. There is also a situation where the X and Y values of the actual point position are not in the same proportional relationship with the X and Y values of the standard point position. As an example, given the first standard point M1 = (80, 50), the first actual point S1 = (72, 40), ΔX1 = -8, ΔY1 = -10, S1x = 0.9×M1x, S1y = 0.8×M1y. Select 90% of the actual offset distance as the adjustment value. The second standard point M2 = (79.2, 48). Image acquisition and analysis are performed on the second pattern generated by the second screen printing template to obtain the center point position of the second pattern and set it as the second actual point position S2. Assume the second actual point position S2 = (71.28, 38.4), then ΔX2 = -7.92, ΔY2 = -9.6. Comparative analysis is performed on the two offsets. At this time, the two offsets are not equal, but at this time S2x = 0.9×M2x, S2y = 0.8×M2y. It is determined that there is a different proportional relationship between the X and Y values of the actual point and the standard point. When setting the third printing target point as the middle of the first actual point and the second actual point, the third target point is S3(71.64, 39.2), S3x = 0.9×M3x, S3y = 0.8×M3y, then the third standard point M3 is (79.6, 49).

[0075] In the second printing stage, two possible situations that may occur during the printing process are considered, namely, the cases where the offset between the second actual point and the second standard point is equal and unequal. Through the analysis of the horizontal offset distance, vertical offset distance, and linear offset distance in the first printing stage, the precise adjustment of the placement position of the screen template in the second printing stage is carried out, ensuring the printing quality and greatly improving the printing accuracy and efficiency. This technical means based on the adjustment of the actual offset distance effectively controls the position error during the printing process, thereby significantly improving the printing quality, especially suitable for occasions with extremely high requirements for printing quality.

[0076] After the second printing is completed, by comparing and analyzing the relationship between the actual points and the standard points in the first two times, the third standard point can be determined, thus achieving more accurate positioning. This technology not only improves the printing accuracy but also provides convenience for subsequent baking, cleaning, and quality inspection processes.

[0077] Secondly, the present invention further optimizes the placement position of the template by introducing the concepts of horizontal offset distance, vertical offset distance, and linear offset distance and analyzing them, ensuring the accuracy and aesthetics of the printed pattern. At the same time, when the offset exceeds the preset range, the system can issue an alarm in a timely manner, thus avoiding the generation of waste products caused by inaccurate printing positions and saving production costs.

[0078] When using the method of the present invention to determine the placement position of the second screen template, when determining the placement position of the second screen template according to the relationship between the position M1 of the first standard point and the position S1 of the first actual point, the adjusted horizontal offset distance and vertical offset distance are less than the offset distance in the relationship between the position M1 of the first standard point and the position S1 of the first actual point, and a horizontal offset distance ratio parameter and a vertical offset distance ratio parameter are set during the offset process. Because in the actual screen printing process, there may be various reasons for the offset. For example, the positioning is inaccurate when placing the screen template, or there is a problem with the ratio determination of the distance in the control program. By setting the offset distance ratio parameter and making the actual offset distance less than the distance between the standard point and the actual point during the first printing, the reasons for the offset can be analyzed, laying a foundation for subsequent finishing. For the setting of the offset parameter, it is between 0 and 1. When choosing 1 as the offset parameter, the second actual point will coincide with the first actual point, and it is impossible to judge the reasons for the offset and the offset relationship. When choosing a smaller offset parameter, the offset amount is too large to accurately determine the reasons for the offset and the offset relationship. Therefore, 0.9 is selected as the offset parameter for illustration. It effectively reduces the position error and improves the printing stability. After the second printing is completed, by comparing and analyzing the center point position of the second pattern and the position of the second standard point, the accuracy of the placement position of the third screen template in the third printing stage is ensured.

[0079] In the third printing stage, for those that require adjustment of the placement position of the third screen template, determine the placement position of the third screen template according to the third standard point determined in the second printing stage. Start the CCD alignment mechanism 3 to identify the position of the glass substrate L. Place the third screen template according to the value of the third standard point M3. Coat the temperature-sensitive color-changing ink C on the third screen template with a circular pattern having a diameter of 15 mm. Lower the printing main machine 5 to make the screen contact the glass substrate L. Apply pressure through the squeegee 4 to transfer the ink through the screen onto the substrate, forming a circular pattern T3 with a diameter of 15 mm. Remove the glass substrate L on the workbench 2, and perform baking, cleaning, and quality inspection on it.

[0080] After the third printing is completed, perform image acquisition and analysis on the third pattern T3 produced by printing through the third screen template, obtain the center point position of the third pattern T3, and set it as the third actual point position. Conduct position comparison and analysis between the third actual point position and the third standard point position, and analyze the lateral offset distance ΔX3, longitudinal offset distance ΔY3, and linear offset distance ΔP3 in the third printing stage.

[0081] In the three printing stages, after each printing is completed, the CCD alignment mechanism 3 performs image acquisition and analysis on the actually printed pattern to obtain the actual point position, which is the center point position of the pattern. Conduct comparison and analysis on the offset situation and error range between the actual point and the standard point. Alarm for any value that does not meet the offset error range, and end the printing stage for those that meet the offset error range.

[0082] By comparing and analyzing the actual offset situation and error range after each printing is completed, this step not only verifies the accuracy of the printing position, but also provides feedback for the subsequent printing process for further adjustment and optimization. It can also monitor and analyze the lateral offset distance, longitudinal offset distance, and linear offset distance in real time, promptly detect and alarm situations that do not meet the offset error range, thereby reducing printing errors and improving product quality.

[0083] Step 3: Perform AF liquid coating treatment and cleaning on the glass substrate L to form a finished touch panel glass, and conduct final quality inspection and packaging and warehousing on the finished product.

[0084] The present invention effectively reduces the consumption of raw materials and lowers the production cost by optimizing the printing process. At the same time, it reduces the emissions of the three wastes, meeting the requirements of green production.

[0085] Specifically, through the precise measurement and adjustment of position offset during the three printing processes, the present invention realizes the precise alignment of the temperature-sensitive color-changing ink pattern, effectively eliminates the position deviation during the printing process, ensures the accuracy and consistency of the pattern, and thus significantly improves the quality and appearance of the product.

[0086] Specifically, by introducing automated equipment and precise measurement techniques, the present invention reduces the need for manual intervention. Meanwhile, through real-time monitoring and offset alarm systems, the printing position is adjusted in a timely manner, reducing the scrap rate and further improving production efficiency.

[0087] Specifically, by optimizing the process flow and improving production efficiency, while ensuring product quality, the present invention reduces production costs. Precise printing techniques reduce material waste, and automated equipment reduces labor costs, overall improving the economic efficiency of production.

[0088] In the stage of screen printing of temperature-sensitive ink, as an example, temperature-sensitive color-changing inks A, B, and C change colors at different temperatures to provide temperature cues:

[0089] Ink A turns blue when the temperature is greater than or equal to 40 °C, indicating a rising temperature;

[0090] Ink B turns purple when the temperature is greater than or equal to 50 °C, warning of too high a temperature;

[0091] Ink C turns red when the temperature is greater than or equal to 60 °C, urgently indicating severe overheating and requiring immediate shutdown for inspection.

[0092] These inks are colorless at normal temperatures, do not affect the appearance of the touchpad, and provide intuitive visual warnings when changing colors.

[0093] Specifically, the present invention selects different screen printing templates and temperature-sensitive color-changing inks in three printing stages, which not only improves the aesthetics of the product, making the printing effect more rich and diverse, but also endows the product with a temperature sensing function, enabling users to obtain different visual feedback according to the temperature change of the touchpad when using the computer keyboard, meeting the needs of different users for the touchpad glass, and enhancing the interactivity and user experience of the product.

[0094] In summary, through a printing positioning method with a different technical concept, the present invention greatly improves the product quality in the production process of the temperature-sensing computer keyboard touchpad glass, represents a new development trend of screen printing technology, and provides new ideas for the technological innovation and development in this field. It shows significant beneficial effects in terms of functionality, production precision, quality control, safety, environmental adaptability, cost savings, and technological development trends, and has high practical value and market prospects.

[0095] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0096] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A manufacturing method of a temperature-sensing computer keyboard touchpad glass, characterized in that, It includes the following steps: Step 1: Conduct preliminary preparation on the glass substrate, including first performing CNC machining, cleaning and quality inspection, then tempering and cooling, then removing the cleaning agent through ultrasonic cleaning and rinsing and drying for quality inspection, and finally performing BM ink screen printing, baking, cleaning and quality inspection on the glass substrate; Step 2: Adjust the process of temperature-sensitive ink screen printing on the glass substrate after preliminary preparation. It is divided into three stages: the first printing stage, the second printing stage, and the third printing stage. In each stage, the printed image is collected and the position is compared and analyzed, and based on the analysis results, the placement position of the next screen template is re-determined; Step 3: Perform AF liquid coating treatment and cleaning on the glass substrate to form a finished touch panel glass, and conduct final quality inspection and packaging and warehousing on the finished product; After the first printing stage is completed, the first actual point position is obtained by collecting and analyzing the image of the first pattern, and it is compared and analyzed with the preset first standard point position to determine the placement position of the screen template in the second printing stage. The first actual point position is the center point position of the first pattern, and the first pattern is the pattern collected by the CCD alignment mechanism after the first printing is completed; In the second printing stage, for those that need to adjust the placement position of the screen template, the second standard point is determined according to the relationship between the first standard point position and the first actual point position, and the placement position of the second screen template is determined with the second standard point; In the second printing stage, when determining the placement position of the second screen template according to the relationship between the first standard point position and the first actual point position, the adjusted horizontal offset distance and vertical offset distance are less than the offset distance in the relationship between the first standard point position and the first actual point position, and a horizontal offset distance ratio parameter and a vertical offset distance ratio parameter are set during the offset process. The offset distance is the offset distance between the actual point and the standard point; In the third printing stage, the third standard point is determined by analyzing the target point and the relationship between the actual points and the standard points in the first printing stage and the second printing stage, and the placement position of the third screen template is determined with the third standard point. The standard point is the reference point for determining the placement position of the screen template, and the actual point is the center point of the actually formed pattern after printing; 2. The manufacturing method of the temperature-sensing computer keyboard touchpad glass according to claim 1, characterized in that, In the first printing stage, the placement position of the first screen template is determined according to the preset first standard point. The preset first standard point is the reference point set in the first printing stage for determining the placement position of the first screen template; 3. The manufacturing method of the temperature-sensing computer keyboard touchpad glass according to claim 2, characterized in that, The target point is determined by analyzing the first actual point position and the second actual point position; 4. The manufacturing method of the temperature-sensing computer keyboard touchpad glass according to claim 1, characterized in that, In the three printing stages, different screen printing templates are selected respectively; 5. The manufacturing method of the temperature-sensing computer keyboard touchpad glass according to claim 1, characterized in that, In the three printing stages, different temperature-sensitive color-changing inks are selected respectively; 6. The manufacturing method of the temperature-sensing computer keyboard touchpad glass according to claim 1, characterized in that, In the three printing stages, the printed patterns are collected for image, the actual point position and the standard point position are obtained and the acquired data are compared and analyzed, and an alarm is given for those that do not meet the offset error range.

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