A structure for improving optical coupling isolation voltage based on a glass sheet

Abstract

The application relates to the technical field of photoelectric device packaging, in particular to a structure for improving light coupling isolation voltage based on a glass sheet, which comprises a tube shell, a cover plate and an inner porcelain sheet, the inside of the tube shell is provided with a containing cavity, the top of the tube shell is provided with an open structure, the cover plate is adapted to be closed on the open top of the tube shell to form a closed space for the containing cavity; the inner porcelain sheet is arranged in the containing cavity and is spaced apart from the bottom of the containing cavity, a light emitting assembly is arranged on the inner porcelain sheet, a light receiving assembly is arranged at the bottom of the containing cavity, and an isolation glass sheet is further arranged in the containing cavity, the isolation glass sheet divides the containing cavity into an upper chamber and a lower chamber which are independent of each other, the light emitting assembly is located in the upper chamber, and the light receiving assembly is located in the lower chamber. The insulation path between the light emitting assembly and the light receiving assembly is changed from a straight line type to a broken line type by additionally arranging the isolation glass sheet, the creeping distance is prolonged, and the isolation voltage of the light coupling is significantly improved without increasing the overall volume of the package.

Description

Technical Field

[0001] This invention relates to the field of optoelectronic device packaging technology, and in particular to a structure based on a glass sheet to improve the isolation voltage of an optocoupler. Background Technology

[0002] An optocoupler, also known as an opto-isolator or optical coupler, is a device that uses light as a medium to transmit electrical signals. An optocoupler consists of a light source and a light receiver sealed in the same housing. During the signal conversion process, the light source converts the electrical signal into an optical signal, and the light receiver receives the optical signal and converts it back into an electrical signal for output, thus achieving electro-optical-electrical conversion.

[0003] Traditional optocouplers typically employ a fully sealed ceramic-metal package structure, which, due to the limited length of the internal insulation path, generally results in a low isolation voltage. Current technologies often rely on increasing the thickness of the ceramic shell or encapsulating it with transparent adhesive to improve the isolation voltage. However, the former leads to an increase in package size, while the latter is limited by reliability lifespan and the stability of optical transmission rate.

[0004] Therefore, how to effectively improve the isolation voltage of the optocoupler without increasing the package size and ensuring optical transmission efficiency and reliability is a technical problem that urgently needs to be solved in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to address the problem in existing technologies of how to effectively improve the isolation voltage of optocouplers without increasing the package size and ensuring optical transmission efficiency and reliability, by providing a structure based on a glass sheet to improve the isolation voltage of optocouplers.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A structure for improving optocoupler isolation voltage based on a glass plate includes a housing, a cover plate, and an inner ceramic plate. The housing has an internal cavity, with an open top. The cover plate fits over the open top of the housing to form a sealed space within the cavity. The inner ceramic plate is disposed within the cavity, spaced apart from the bottom of the cavity. A light-emitting component is mounted on the inner ceramic plate, and a light-receiving component is disposed at the bottom of the cavity, with the light-emitting and light-receiving components positioned vertically opposite each other. An isolation glass plate is also disposed within the cavity, dividing it into an upper chamber and a lower chamber. The light-emitting component is located in the upper chamber, and the light-receiving component is located in the lower chamber.

[0008] Preferably, the sidewall of the receiving cavity is provided with a first protrusion and a second protrusion. The first protrusion is used to form a platform for placing the inner ceramic tile, and the second protrusion is used to form a platform for placing the isolation glass slide. The height by which the second protrusion protrudes from the sidewall of the receiving cavity is greater than the height by which the first protrusion protrudes from the sidewall of the receiving cavity.

[0009] The second boss includes a support area and a glue groove area. The support area is disposed along the edge of the second boss and protrudes from the upper surface of the second boss. The support area is used to support the edge of the isolation glass sheet, and after the isolation glass sheet is placed on the support area, its structural edge extends into the glue groove area.

[0010] The adhesive groove area is used to form a groove structure to accommodate sealant. During the installation of the isolation glass sheet, sealant is filled into the adhesive groove area. After the sealant cures, the isolation glass sheet is fixed and the sealant fills the gap between the isolation glass sheet and the side wall of the tube shell.

[0011] Preferably, the first boss and the second boss are an integral structure, and the end face of the first boss is also provided with a drainage channel, the drainage channel is connected to the glue tank area, the edge of the drainage channel is flush with the bottom of the glue tank area, and the width of the drainage channel is greater than the sum of the thickness of the insulating glass sheet and the height of the support area.

[0012] Preferably, the sealant covers the surface of the insulating glass sheet.

[0013] Preferably, the surface of the pier area is provided with an elastic rubber pad layer.

[0014] Preferably, the tube shell is provided with an exhaust port corresponding to the lower chamber. During the installation of the isolation glass slide, the air in the lower chamber can be extracted through the exhaust port using a vacuum device, thereby creating a negative pressure environment inside the lower chamber.

[0015] Preferably, the isolation glass sheet is further provided with an isolation cylinder, the light-emitting component is positioned in front of the area of ​​the isolation cylinder, and the height of the isolation cylinder is greater than or equal to the thickness of the sealant layer on the surface of the isolation glass sheet.

[0016] Preferably, a convex lens is also provided inside the isolation cylinder. The optical axis of the convex lens is coaxial with the light emission direction of the light-emitting component. The convex lens is used to concentrate the light signal emitted by the light-emitting component to the effective photosensitive area of ​​the light-receiving component.

[0017] Preferably, the isolation cylinder is made of a thermally conductive material. The isolation cylinder includes an upper cylinder and a lower cylinder. The upper cylinder is disposed on the upper surface of the isolation glass sheet, and the lower cylinder is disposed on the lower surface of the isolation glass sheet. The edge of the convex lens is also provided with isolation rubber. The convex lens can slide inside the isolation cylinder. The convex lens and the isolation cylinder have a first mating configuration and a second mating configuration.

[0018] When the convex lens is located inside the upper cylinder, the convex lens and the isolation cylinder are in a first mating configuration.

[0019] When the temperature in the upper chamber rises to a set value, the heated air expands and pushes the convex lens to slide downward along the isolation cylinder against friction. When the convex lens slides into the end region of the lower cylinder, the convex lens and the isolation cylinder switch to a second engagement state. At this time, the heat accumulated in the upper chamber is dissipated to the lower chamber through the isolation cylinder. When the temperatures in the upper and lower chambers return to equal, the convex lens slides upward along the isolation cylinder under the push of air pressure until it returns to the upper cylinder and returns to the first engagement state.

[0020] Preferably, when the convex lens and the isolation cylinder are in the second mating configuration, the concentration of photons gathered in the effective photosensitive area of ​​the light-receiving component is greater than that in the first mating configuration.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. The structure of the present invention based on glass sheet to improve the isolation voltage of optocoupler, by adding the isolation glass sheet, changes the insulation path between the light-emitting component and the light-receiving component from "straight line" to "zigzag line", which extends the creepage distance and significantly improves the isolation voltage of optocoupler without increasing the overall package volume;

[0023] 2. The structure of the present invention, which improves the isolation voltage of an optocoupler based on a glass sheet, designs the isolation cylinder to be made of a thermally conductive material and utilizes the pressure change caused by the thermal expansion of air in the upper chamber to drive the convex lens to slide within the isolation cylinder, thereby achieving adaptive heat control. Specifically, when the light-emitting component generates heat and raises the temperature in the upper chamber, the air expands, pushing the convex lens from its initial position in the upper cylinder (first engagement state) to its position in the lower cylinder (second engagement state). At this time, the area of ​​the upper chamber increases, and the isolation cylinder acts as a thermal bridge, conducting the heat accumulated in the upper chamber to the lower chamber. The hot air in the upper chamber exchanges heat with the cold air in the lower chamber, achieving heat dissipation. When the temperature of the upper chamber gradually decreases and the temperatures of the upper and lower chambers tend to balance, the air pressure recovers, and the convex lens slides back into the upper cylinder under the action of the pressure difference, restoring the first engagement state. This dynamic thermal management mechanism not only effectively solves the heat dissipation problem caused by the sealant covering, but also automatically adjusts the heat dissipation efficiency according to the actual operating temperature, ensuring that the optocoupler works stably in a suitable temperature environment, further improving its reliability and service life.

[0024] On the other hand, it is also considered that when the light-emitting component ages, its light intensity decreases, leading to a reduction in the carrier generation rate of the light-receiving component, which in turn slows down the charging and discharging of the PN junction capacitor, resulting in a decrease in the response speed of the optocoupler. In this solution, the temperature inside the upper cavity is increased by controlling the light-emitting component, causing the convex lens to slide to the lower cylinder. At this time, the convex lens can more concentratedly focus the light signal emitted by the light-emitting component onto the effective photosensitive area of ​​the light-receiving component, thereby maintaining the light energy density received by the light-receiving component to a certain extent and delaying the decrease in response speed caused by the aging of the light-emitting component. Furthermore, in this embodiment, by adjusting the position of the convex lens inside the lower cylinder, the light signal can be focused or diffused in the effective photosensitive area of ​​the light-receiving component, enabling dynamic adjustment of the optocoupler's transmission characteristics to adapt to the signal transmission speed or sensitivity requirements under different working scenarios. For example, in high-frequency signal transmission scenarios requiring rapid response, the signal transmission rate can be improved by controlling the convex lens to focus on the central area of ​​the light-receiving component; while in weak signal detection scenarios requiring high sensitivity, the position of the convex lens can be appropriately adjusted to make the light diffuse moderately on the light-receiving component, thereby expanding the photosensitive area and enhancing the ability to capture weak light signals. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an exploded structure based on a glass sheet to enhance the isolation voltage of an optocoupler;

[0026] Figure 2This is a cross-sectional structural diagram of a structure that enhances the isolation voltage of an optocoupler based on a glass sheet;

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the isolation glass slide and the second protrusion.

[0028] Figure 4 yes Figure 3 A schematic diagram of the structure of A in the middle;

[0029] Figure 5 This is a cross-sectional structural diagram of an isolation tube installed on an isolation glass slide;

[0030] Figure 6 yes Figure 5 A schematic diagram of the structure of B in the middle;

[0031] Figure 7 This is a schematic diagram of the second mating configuration between the convex lens and the isolation cylinder.

[0032] The markings in the diagram are: 1-tube shell, 2-cover plate, 3-inner ceramic plate, 4-light-emitting component, 5-light-receiving component, 6-isolation glass plate, 7-upper chamber, 8-lower chamber, 9-first protrusion, 10-second protrusion, 11-support area, 12-glue groove area, 13-drainage groove, 14-vent hole, 15-isolation cylinder, 16-convex lens, 17-upper cylinder, 18-lower cylinder. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings.

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] Example 1: As Figure 1 and Figure 2As shown, the present invention discloses a structure for improving the isolation voltage of an optocoupler based on a glass plate, comprising a housing 1, a cover plate 2, and an inner ceramic plate 3. The housing 1 has an internal cavity, and its top is open. The cover plate 2 is adapted to cover the open top of the housing 1, thus forming a sealed space within the cavity. The inner ceramic plate 3 is disposed within the cavity, spaced apart from the bottom of the cavity. A light-emitting component 4 is disposed on the inner ceramic plate 3, and a light-receiving component 5 is disposed at the bottom of the cavity, with the light-emitting component 4 and the light-receiving component 5 arranged vertically opposite each other. An isolation glass plate 6 is also disposed within the cavity, dividing it into an independent upper chamber 7 and a lower chamber 8. The light-emitting component 4 is located in the upper chamber 7, and the light-receiving component 5 is located in the lower chamber 8.

[0036] The structure of the present invention, which improves the isolation voltage of the optocoupler based on a glass sheet, is adopted. By adding the isolation glass sheet 6, the insulation path between the light-emitting component 4 and the light-receiving component 5 is changed from a "straight line" to a "zigzag line", which extends the creepage distance and significantly improves the isolation voltage of the optocoupler without increasing the overall package volume.

[0037] Specifically, in this embodiment, the tube shell 1 and the cover plate 2 are sealed together to form an encapsulation cavity; the inner ceramic plate 3 is fixed on the stepped structure provided at the opening of the tube shell 1, the light-emitting component 4 is fixed on the inner ceramic plate 3 by conductive adhesive, and the light-emitting component 4 is electrically connected to the pins of the tube shell 1; the isolation glass plate 6 is made of quartz glass with a thickness greater than 0.1 mm, a smooth and defect-free surface, and chamfered edges, and the setting of the isolation glass plate 6 does not change the light transmission efficiency of the optocoupler;

[0038] The specific packaging process is as follows:

[0039] The light-receiving component 5 is welded to the bottom of the tube shell 1 using conductive adhesive to complete the wire bonding connection;

[0040] The cut isolation glass sheet 6 is placed on the stepped structure processed inside the tube shell 1 and fixed with low-temperature solder;

[0041] The light-emitting component 4 is bonded to the inner ceramic plate 3, and then the inner ceramic plate 3 is installed on the stepped structure provided at the opening of the tube shell 1, and the wire connection is completed.

[0042] Align the cover plate 2 with the open end of the tube shell 1 and seal them together using welding equipment. This forms a light transmission and isolation structure consisting of "light-emitting component 4 - isolation glass plate 6 - light-receiving component 5".

[0043] It needs to be explained that, Figure 1 and Figure 2 The structure located at the bottom of the casing 1 is the lead frame, which serves as a bridge connecting the microchip and the macro circuit board. Since the lead frame is not involved in the core structural improvements of this design, it will not be described in detail here.

[0044] Example 2: Figure 3 and Figure 4 As shown, the present invention provides a structure for improving the optocoupler isolation voltage based on a glass plate. Further, based on the above method, a first protrusion 9 and a second protrusion 10 are provided on the sidewall of the receiving cavity. The first protrusion 9 forms a platform for placing the inner ceramic plate 3, and the second protrusion 10 forms a platform for placing the isolation glass plate 6. The height of the second protrusion 10 protruding from the sidewall of the receiving cavity is greater than the height of the first protrusion 9 protruding from the sidewall of the receiving cavity.

[0045] The second boss 10 includes a support area 11 and a glue groove area 12. The support area 11 is disposed along the edge of the second boss 10 and protrudes from the upper surface of the second boss 10. The support area 11 is used to support the edge of the isolation glass sheet 6, and after the isolation glass sheet 6 is placed on the support area 11, its structural edge extends to the glue groove area 12.

[0046] The adhesive groove area 12 is used to form a groove structure for accommodating sealant. During the installation of the isolation glass sheet 6, sealant is filled into the adhesive groove area 12. After the sealant cures, the isolation glass sheet 6 is fixed and the sealant fills the gap between the isolation glass sheet 6 and the side wall of the tube shell 1.

[0047] In this embodiment, a first protrusion 9 and a second protrusion 10 are provided on the side wall of the cavity of the tube shell 1, and the height difference is used to achieve the layered arrangement of the inner ceramic plate 3 and the isolation glass plate 6. The support area 11 on the second protrusion 10 is designed to precisely support the edge of the isolation glass plate 6, ensuring its horizontal placement and coaxiality with the light-emitting and light-receiving components 5. The setting of the glue groove area 12 provides space for the filling of sealant. When epoxy resin or other sealant is filled into the glue groove area 12, it can not only firmly fix the isolation glass plate 6, but the cured sealant can also effectively fill the tiny gap between the isolation glass plate 6 and the side wall of the tube shell 1, further blocking the surface creepage path that may exist between the upper and lower chambers 8, and improving the overall insulation performance.

[0048] As a preferred embodiment, based on the above method, the first boss 9 and the second boss 10 are further integrated into a single structure. The end face of the first boss 9 is also provided with a drainage channel 13, which communicates with the adhesive groove area 12. The edge of the drainage channel 13 is flush with the bottom of the adhesive groove area 12, and the width of the drainage channel 13 is greater than the sum of the thickness of the insulating glass sheet 6 and the height of the support area 11. This structural design allows the adhesive groove area 12 to be fully exposed, facilitating the smooth flow of sealant into the adhesive groove area 12 during sealant filling and improving the fullness of the sealant filling. Simultaneously, this structural design also allows operators to easily observe the filling status of the adhesive groove area 12, avoiding insufficient sealant filling or overflow due to visual obstruction.

[0049] As a preferred embodiment, based on the above method, a sealant is further applied to cover the surface of the insulating glass sheet 6.

[0050] In this embodiment, a sealing layer is formed on the surface of the isolation glass slide 6. This enhances the mechanical strength of the isolation glass slide 6, preventing it from cracking due to stress concentration during subsequent encapsulation or use. Furthermore, it simplifies the application of the sealing layer, improving encapsulation efficiency. Simultaneously, the sealing layer covering the surface of the isolation glass slide 6 also provides optical matching, reducing light reflection loss on the surface of the isolation glass slide 6. This ensures that while improving isolation performance, light transmission efficiency remains unaffected.

[0051] As a preferred embodiment, based on the above method, the surface of the support area 11 is further provided with an elastic rubber pad. This structural arrangement improves the tightness of the fit between the insulating glass sheet 6 and the support area 11, reducing the risk of leakage during sealant application. Furthermore, the elastic rubber pad acts as a buffer when the insulating glass sheet 6 is placed, reducing the risk of scratches / damage to the insulating glass sheet 6 during placement.

[0052] As a preferred embodiment, based on the above method, the shell 1 is further provided with an exhaust port 14 at the position corresponding to the lower chamber 8. During the installation of the isolation glass slide 6, the air in the lower chamber 8 can be extracted by using a vacuum device through the exhaust port 14, so that a negative pressure environment can be formed inside the lower chamber 8.

[0053] Specifically, in this embodiment, after the isolation glass sheet 6 is placed on the second protrusion 10, the bottom of the tube shell 1 is adsorbed by the suction nozzle of the vacuum equipment. At this time, the air in the lower chamber 8 is extracted through the exhaust hole 14, and the lower chamber 8 forms a negative pressure environment. Under the action of the external atmospheric pressure, the isolation glass sheet 6 will be tightly pressed onto the elastic rubber pad layer of the support area 11. This avoids the displacement of the isolation glass sheet 6 during the sealant filling operation and ensures the installation quality of the isolation glass sheet 6. Furthermore, using negative pressure to tightly press the isolation glass sheet 6 onto the elastic rubber pad layer of the support area 11 can also further prevent leakage during the sealant filling operation.

[0054] It should be noted that in this embodiment, the vent 14 needs to be sealed after the overall optocoupler packaging is completed. For example, laser welding or high-temperature sealant can be used to seal it to ensure the airtightness of the lower chamber 8 and prevent external moisture or impurities from entering and affecting the optocoupler performance.

[0055] Example 3: As Figures 5 to 7 As shown, the present invention provides a structure for improving the isolation voltage of an optocoupler based on a glass sheet. In addition to the above method, the isolation glass sheet 6 is further provided with an isolation cylinder 15. The light-emitting component 4 is positioned in front of the area of ​​the isolation cylinder 15. The height of the isolation cylinder 15 is greater than or equal to the thickness of the sealant layer on the surface of the isolation glass sheet 6.

[0056] In this embodiment, it is considered that as the optocoupler is used for a longer period of time, the sealant layer may shrink slightly or age due to environmental factors (such as temperature changes, humidity effects, etc.), resulting in delamination or gaps between the sealant layer and the isolation glass plate 6, which in turn affects the stable transmission of optical signals. Based on this, this embodiment constructs an independent transmission channel for optical signal transmission by setting the isolation cylinder 15 on the isolation glass plate 6. In this way, even if the sealant layer shrinks or ages, the optical signal emitted by the light-emitting component 4 can still be preferentially transmitted through the internal space of the isolation cylinder 15, effectively reducing the interference of changes in the sealant layer on the optical transmission path. Furthermore, in this embodiment, the isolation cylinder 15 can also serve as a clamping point for mounting the isolation glass plate 6, preventing operators or instruments from directly contacting the optical surface of the isolation glass plate 6 and causing contamination or scratches, further ensuring the quality of optocoupler packaging.

[0057] As a preferred embodiment, based on the above method, a convex lens 16 is further provided inside the isolation cylinder 15. The optical axis of the convex lens 16 is coaxially arranged with the light emission direction of the light-emitting component 4. The convex lens 16 is used to concentrate the light signal emitted by the light-emitting component 4 to the effective photosensitive area of ​​the light-receiving component 5.

[0058] In this embodiment, the focusing effect of the convex lens 16 significantly increases the number of photons illuminating the effective photosensitive area of ​​the light-receiving component 5 per unit area, thereby enhancing the intensity of the optical signal and ensuring that the optocoupler maintains high photoelectric conversion efficiency and signal transmission stability while increasing the isolation voltage. In particular, when the light-emitting component 4 ages and its light emission intensity weakens, the focusing effect of the convex lens 16 can compensate for the attenuation of the optical signal to a certain extent, extending the service life of the optocoupler. Simultaneously, the introduction of the convex lens 16 also relatively reduces the alignment accuracy requirements between the light-emitting component 4 and the light-receiving component 5, which is beneficial for improving packaging yield.

[0059] As a preferred embodiment, based on the above method, the isolation cylinder 15 is further made of a thermally conductive material. The isolation cylinder includes an upper cylinder 17 and a lower cylinder 18. The upper cylinder 17 is disposed on the upper surface of the isolation glass sheet 6, and the lower cylinder 18 is disposed on the lower surface of the isolation glass sheet 6. The edge of the convex lens 16 is also provided with isolation rubber. The convex lens 16 can slide within the isolation cylinder 15. The convex lens 16 and the isolation cylinder 15 have a first mating configuration and a second mating configuration.

[0060] When the convex lens 16 is located inside the upper cylinder 17, the convex lens 16 and the isolation cylinder 15 are in a first mating configuration.

[0061] When the temperature inside the upper chamber 7 rises to a set value, the heated air expands and pushes the convex lens 16 to slide downward along the isolation cylinder 15 against friction. When the convex lens 16 slides into the end region of the lower cylinder 18, the convex lens 16 and the isolation cylinder 15 switch to a second engagement state. At this time, the heat accumulated in the upper chamber 7 is dissipated to the lower chamber 8 through the isolation cylinder 15. When the temperatures in the upper chamber 7 and the lower chamber 8 return to equal, the convex lens 16 slides upward along the isolation cylinder 15 under the push of air pressure until it returns to the upper cylinder 17 and returns to the first engagement state.

[0062] When the convex lens 16 and the isolation cylinder 15 are in the second mating configuration, the concentration of photons gathered in the effective photosensitive area of ​​the light-receiving component 5 is greater than that in the first mating configuration.

[0063] In this embodiment, it is considered that the sealant covering the surface of the isolation glass sheet 6, forming a covering layer of a certain thickness, will hinder the heat exchange between the upper chamber 7 and the lower chamber 8 to a certain extent. If too much heat generated by the light-emitting component 4 during operation accumulates in the upper chamber 7, it may accelerate the aging of the light-emitting component 4 and even affect its luminous efficiency and stability. Based on this, in this embodiment, the isolation cylinder 15 is designed to be made of a thermally conductive material, and the pressure change generated by the thermal expansion of the air in the upper chamber 7 is used to drive the convex lens 16 to slide within the isolation cylinder 15, thereby achieving adaptive heat control. Specifically, when the light-emitting component 4 generates heat and raises the temperature in the upper chamber 7, the air expands, pushing the convex lens 16 from the initial upper cylinder 17 (first mating configuration) to the lower cylinder 18 (second mating configuration). At this time, the area of ​​the upper chamber 7 increases, and the isolation cylinder 15 acts as a heat-conducting bridge, transferring the heat accumulated in the upper chamber 7 to the lower chamber 8. The hot air in the upper chamber 7 exchanges heat with the cold air in the lower chamber 8, achieving heat dissipation. As the temperature of the upper chamber 7 gradually decreases and the temperatures of the upper chamber 7 and lower chamber 8 tend to balance, the air pressure recovers, and the convex lens 16 slides upward back into the upper cylinder 17 under the action of the air pressure difference, restoring the first mating configuration. This dynamic thermal management mechanism in this embodiment not only effectively solves the heat dissipation problem caused by the sealant covering, but also automatically adjusts the heat dissipation efficiency according to the actual operating temperature, ensuring that the optocoupler works stably in a suitable temperature environment, further improving its reliability and service life.

[0064] On the other hand, this embodiment also considers that when the light-emitting component 4 ages, its light intensity decreases, leading to a reduction in the carrier generation rate of the light-receiving component 5, which in turn slows down the charging and discharging of the PN junction capacitor, resulting in a decrease in the response speed of the optocoupler. In this embodiment, by controlling the temperature increase in the upper chamber 7 through the light-emitting component 4, the convex lens 16 slides to the lower cylinder 18. At this time, the convex lens 16 can more concentratedly focus the light signal emitted by the light-emitting component 4 onto the effective photosensitive area of ​​the light-receiving component 5, thereby maintaining the light energy density received by the light-receiving component 5 to a certain extent and delaying the decrease in response speed caused by the aging of the light-emitting component 4. Furthermore, by adjusting the position of the convex lens 16 in the lower cylinder 18, the light signal can be focused or diffused in the effective photosensitive area of ​​the light-receiving component 5, which can also achieve dynamic adjustment of the optocoupler transmission characteristics to adapt to the needs of signal transmission speed or sensitivity in different working scenarios. For example, in high-frequency signal transmission scenarios requiring rapid response, the signal transmission rate can be improved by controlling the convex lens 16 to focus on the central area of ​​the light-receiving component 5; while in weak signal detection scenarios requiring high sensitivity, the position of the convex lens 16 can be appropriately adjusted to make the light diffuse moderately on the light-receiving component 5, thereby expanding the photosensitive area and enhancing the ability to capture weak light signals.

[0065] It should be noted that in this embodiment, limit rings are provided at the ends of both the upper cylinder 17 and the lower cylinder 18 to prevent the convex lens 16 from leaving the effective working area of ​​the isolation cylinder 15 and to ensure that the sliding stroke of the convex lens 16 is always within a controllable range.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A structure for improving optocoupler isolation voltage based on a glass sheet, characterized in that, The device includes a shell, a cover plate, and an inner ceramic plate. The shell has an internal cavity, and its top is open. The cover plate fits over the open top of the shell to create a sealed cavity. The inner ceramic plate is disposed within the cavity and spaced apart from the bottom of the cavity. A light-emitting component is mounted on the inner ceramic plate, and a light-receiving component is mounted at the bottom of the cavity. The light-emitting component and the light-receiving component are positioned vertically opposite each other. A separating glass plate is also disposed within the cavity, dividing it into an upper chamber and a lower chamber. The light-emitting component is located in the upper chamber, and the light-receiving component is located in the lower chamber.

2. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 1, characterized in that, The receiving cavity has a first protrusion and a second protrusion on its sidewall. The first protrusion forms a platform for placing the inner ceramic tile, and the second protrusion forms a platform for placing the insulating glass slide. The second protrusion protrudes from the sidewall of the receiving cavity by a greater height than the first protrusion. The second boss includes a support area and a glue groove area. The support area is disposed along the edge of the second boss and protrudes from the upper surface of the second boss. The support area is used to support the edge of the isolation glass sheet, and after the isolation glass sheet is placed on the support area, its structural edge extends into the glue groove area. The adhesive groove area is used to form a groove structure to accommodate sealant. During the installation of the isolation glass sheet, sealant is filled into the adhesive groove area. After the sealant cures, the isolation glass sheet is fixed and the sealant fills the gap between the isolation glass sheet and the side wall of the tube shell.

3. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 2, characterized in that, The first boss and the second boss are an integral structure. The end face of the first boss is also provided with a drainage channel. The drainage channel is connected to the glue tank area. The edge of the drainage channel is flush with the bottom of the glue tank area. The width of the drainage channel is greater than the sum of the thickness of the insulating glass sheet and the height of the support area.

4. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 3, characterized in that, The sealant covers the surface of the insulating glass sheet.

5. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 4, characterized in that, An elastic rubber pad layer is provided on the surface of the pier area.

6. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 5, characterized in that, The tube shell is also provided with an exhaust port corresponding to the lower chamber. During the installation of the isolation glass slide, the air in the lower chamber is extracted through the exhaust port using a vacuum device, which can create a negative pressure environment inside the lower chamber.

7. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 6, characterized in that, An isolation cylinder is also provided on the isolation glass sheet, and the light-emitting component is positioned in front of the area of ​​the isolation cylinder. The height of the isolation cylinder is greater than or equal to the thickness of the sealant layer on the surface of the isolation glass sheet.

8. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 7, characterized in that, The isolation cylinder is also equipped with a convex lens, the optical axis of which is coaxial with the light emission direction of the light-emitting component. The convex lens is used to concentrate the light signal emitted by the light-emitting component to the effective photosensitive area of ​​the light-receiving component.

9. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 8, characterized in that, The isolation cylinder is made of a thermally conductive material and includes an upper cylinder and a lower cylinder. The upper cylinder is disposed on the upper surface of the isolation glass sheet, and the lower cylinder is disposed on the lower surface of the isolation glass sheet. The edge of the convex lens is also provided with insulating rubber. The convex lens can slide within the isolation cylinder. The convex lens and the isolation cylinder have a first mating configuration and a second mating configuration. When the convex lens is located inside the upper cylinder, the convex lens and the isolation cylinder are in a first mating configuration. When the temperature in the upper chamber rises to a set value, the heated air expands and pushes the convex lens to slide downward along the isolation cylinder against friction. When the convex lens slides into the end region of the lower cylinder, the convex lens and the isolation cylinder switch to a second engagement state. At this time, the heat accumulated in the upper chamber is dissipated to the lower chamber through the isolation cylinder. When the temperatures in the upper and lower chambers return to equal, the convex lens slides upward along the isolation cylinder under the push of air pressure until it returns to the upper cylinder and returns to the first engagement state.

10. The structure based on glass sheet to improve optocoupler isolation voltage according to claim 9, characterized in that, When the convex lens and the isolation cylinder are in the second mating configuration, the concentration of photons gathered in the effective photosensitive area of ​​the light-receiving component is greater than that in the first mating configuration.

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