Light emitting diode structure with electrostatic protection function

Abstract

The application belongs to the technical field of semiconductor devices, and particularly relates to a light-emitting diode structure with an electrostatic protection function, which comprises an insulating base and a transparent lampshade installed on the end face of the insulating base, the inside of the transparent lampshade is provided with a semiconductor light-emitting assembly, and the light-emitting diode structure further comprises: a conductive ring, the conductive ring is fixedly sleeved on the outer side wall of the transparent lampshade, and the conductive ring is fixedly connected with the top of the insulating base, the outer side wall of the transparent lampshade and the side wall of the insulating base are both coated with a transparent conductive coating, an electrostatic breakdown unit is installed on the bottom of the insulating base, and the conductive ring is installed with a conductive assembly. The application can not only guide weak electrostatic charges away from the outer surface of the light-emitting diode in time, so that the electrostatic charges are gathered, but also can generate air flow by electrostatic breakdown of air, and the air flow can eliminate dust on the surface of the light-emitting diode, so that the electrostatic charges can be prevented from invading the semiconductor light-emitting element and affecting the light-emitting effect, and dust can be automatically removed.

Description

Technical Field

[0001] This invention belongs to the field of semiconductor device technology, and in particular relates to a light-emitting diode structure with electrostatic protection function. Background Technology

[0002] As a highly efficient and energy-saving semiconductor light-emitting device, light-emitting diodes are now widely used in many fields such as lighting, display, and signal indication. They have advantages such as long life, fast response speed, and low power consumption, which have greatly promoted the development of various industries.

[0003] Light-emitting diodes (LEDs) are composed of fine semiconductor materials, and their PN junction structure is fragile. The instantaneous high voltage generated by static electricity can easily break down the PN junction, causing the LED to malfunction. Therefore, to reduce the impact of static electricity on LEDs, electrostatic discharge (ESD) protection is necessary, as illustrated in the LED device disclosed in patent publication number CN101924099B. Currently, LED protection often relies on components such as ESD protection diodes. When an ESD surge occurs in the circuit and the ESD voltage reaches the threshold of the ESD protection diode, it will promptly draw out the ESD current, interrupting the abnormal current flowing to the LED's light-emitting element, thus ensuring the safety of the light-emitting element. However, ESD protection diodes are primarily designed to handle ESD surges in the circuit. For weak static electricity in the environment, the voltage cannot trigger the ESD protection diode's threshold. Although these static charges may not directly damage the light-emitting element, when they come into contact with it, even if they do not cause physical damage to the PN junction, they will create a local electric field near the PN junction. This electric field will interfere with the normal distribution of charge carriers (electrons and holes) inside the semiconductor, thereby affecting the LED's light-emitting effect. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a light-emitting diode structure with electrostatic protection function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a light-emitting diode structure with electrostatic protection function, comprising an insulating base and a transparent lampshade mounted on the end face of the insulating base, wherein a semiconductor light-emitting component is disposed inside the transparent lampshade, and further comprising:

[0006] A conductive ring is fixedly fitted onto the outer side wall of the transparent lampshade, and the conductive ring is fixedly connected to the top of the insulating base. Both the outer side wall of the transparent lampshade and the side wall of the insulating base are coated with a transparent conductive coating.

[0007] An electrostatic discharge unit is installed at the bottom of the insulating base. The conductive ring is equipped with a conductive component, which guides the static charge to the electrostatic discharge unit through the conductive component.

[0008] An electrostatic discharge unit is installed inside the electrostatic breakdown unit, and the electrostatic discharge unit discharges static charge.

[0009] In the aforementioned light-emitting diode structure with electrostatic protection function, the electrostatic breakdown unit includes an insulating block. The bottom of the insulating base has a mounting groove, and the insulating block is fixedly connected to the groove opening. A hollow steel ball is fixedly installed on the end face of the insulating block. The hollow steel ball has a discharge tip and a receiving tip inside. The discharge tip is installed on the top of the insulating block and does not contact the hollow steel ball. The receiving tip is installed on the inner wall of the hollow steel ball. An exhaust hole is provided on the side wall of the hollow steel ball.

[0010] In the aforementioned light-emitting diode structure with electrostatic protection function, the conductive component includes two conductive rods, both of which are U-shaped. One end of each of the two conductive rods is fixedly connected to the outer wall of the conductive ring, and the opposite ends of the two conductive rods are jointly fixedly connected to a conductive post. The conductive post penetrates the insulating block and is fixedly connected to the bottom of the discharge cone.

[0011] In the aforementioned light-emitting diode structure with electrostatic protection function, the electrostatic elimination unit includes a conductive frame strip sleeved on the outside of a hollow steel ball, and the conductive frame strip is fixedly installed on the top of an insulating block. A metal mesh cover is fixedly installed on the top of the insulating block, and the hollow steel ball is disposed inside the metal mesh cover. A grounding pin is fixedly inserted into the bottom of the insulating block, and both grounding pins are in contact with the conductive frame strip.

[0012] In the aforementioned light-emitting diode structure with electrostatic protection, the semiconductor light-emitting component includes a reflective cone disposed inside a transparent lampshade. An insulating and heat-conducting base is fixedly installed inside the reflective cone. A semiconductor light-emitting element is mounted on the top of the insulating and heat-conducting base. Conductive blocks are disposed on both sides of the reflective cone inside the transparent lampshade, and both conductive blocks are electrically connected to the semiconductor light-emitting element through conductive wires. Conductive pins are fixedly installed at the bottom of both conductive blocks, and the lower ends of both conductive pins penetrate the insulating base and extend to the bottom of the insulating base.

[0013] In the aforementioned light-emitting diode structure with electrostatic protection function, the mounting groove has an annular venting groove in its groove wall, the conductive ring has multiple soot blowing grooves in its inner wall, and the upper side of the annular venting groove has multiple connecting holes, each of which is connected to the soot blowing groove.

[0014] In the aforementioned LED structure with electrostatic protection, a heat-conducting column is integrally formed on the end face of the insulating base, and the heat-conducting column penetrates the reflective cone and is fixedly connected to the bottom of the insulating heat-conducting base. Multiple heat dissipation columns are fixedly installed at the lower outer edge of the insulating base.

[0015] In the aforementioned light-emitting diode structure with electrostatic protection, insulating sleeves are fixedly fitted onto the outer walls of both conductive pins, and the insulating sleeves penetrate the end face of the insulating base and contact the bottom of the conductive block on the same side.

[0016] Compared with existing technologies, the advantages of a light-emitting diode structure with electrostatic protection are:

[0017] The semiconductor light-emitting component can emit light by the cooperation of the insulating base, transparent lampshade, and semiconductor light-emitting component. The conductive ring and transparent conductive coating can guide static electricity in the surrounding environment to the conductive outlet. In addition, the electrostatic discharge unit and conductive component can concentrate and collect static charge inside the electrostatic discharge unit, thereby preventing static charge from entering the semiconductor light-emitting component and affecting its light-emitting effect.

[0018] Through the electrostatic breakdown unit and the set annular exhaust groove, dust blowing groove and connecting hole, it is possible to use electrostatic concentration, and after the electrostatic concentration reaches a certain electrostatic strength, it can generate airflow by breaking down the air, and the airflow can help remove dust that may adhere to the outer surface of the transparent lampshade.

[0019] The electrostatic discharge unit can promptly guide and discharge the static charge generated after the electrostatic breakdown unit breaks down into air, thereby preventing the static charge from affecting the normal operation of the LED. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a light-emitting diode structure with electrostatic protection function provided by the present invention;

[0021] Figure 2 This is a cross-sectional view of a light-emitting diode structure with electrostatic protection provided by the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of a reflective cone with electrostatic protection function based on a light-emitting diode structure provided by the present invention;

[0023] Figure 4 This is a three-dimensional structural schematic diagram of an electrostatic breakdown unit of a light-emitting diode structure with electrostatic protection function provided by the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of a hollow steel ball with electrostatic protection function for a light-emitting diode structure provided by the present invention;

[0025] Figure 6 This invention provides a light-emitting diode structure with electrostatic protection function. Figure 1 Enlarged view of the structure of section A;

[0026] Figure 7 This invention provides a light-emitting diode structure with electrostatic protection function. Figure 2 Enlarged view of the structure of section B.

[0027] In the diagram: 1 Insulating base, 2 Transparent lampshade, 3 Semiconductor light-emitting component, 31 Reflective cone, 32 Insulating heat-conducting base, 33 Semiconductor light-emitting element, 34 Conductive block, 35 Conductive pin, 4 Conductive ring, 5 Electrostatic breakdown unit, 51 Insulating block, 52 Mounting slot, 53 Hollow steel ball, 54 Discharge cone, 55 Receiving cone, 56 Vent hole, 6 Conductive component, 61 Conductive rod, 62 Conductive column, 7 Electrostatic elimination unit, 71 Conductive frame strip, 72 Metal mesh cover, 73 Grounding pin, 8 Annular vent groove, 9 Soot blowing groove, 10 Connecting hole, 11 Heat-conducting column, 12 Heat dissipation column, 13 Insulating sleeve. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] like Figures 1-7 As shown, a light-emitting diode structure with electrostatic protection function includes an insulating base 1 and a transparent lampshade 2 mounted on the end face of the insulating base 1. A semiconductor light-emitting component 3 is disposed inside the transparent lampshade 2. It also includes a conductive ring 4, which is fixedly sleeved on the outer side wall of the transparent lampshade 2 and fixedly connected to the top of the insulating base 1. The outer side wall of the transparent lampshade 2 and the side wall of the insulating base 1 are both coated with a transparent conductive coating, which is an indium tin oxide coating.

[0030] The electrostatic discharge unit 5 is installed at the bottom of the insulating base 1. The electrostatic discharge unit 5 includes an insulating block 51. The bottom of the insulating base 1 is provided with a mounting groove 52, and the insulating block 51 is fixedly connected to the groove of the mounting groove 52. A hollow steel ball 53 is fixedly installed on the end face of the insulating block 51. The hollow steel ball 53 is provided with a discharge tip 54 and a receiving tip 55 inside. The discharge tip 54 is installed on the top of the insulating block 51 and does not contact the hollow steel ball 53. The receiving tip 55 is installed on the inner wall of the hollow steel ball 53. An exhaust hole 56 is provided on the side wall of the hollow steel ball 53. As the static charge accumulates at the discharge tip 54, the static charge intensity continuously increases until it breaks down the air with the cooperation of the receiving tip 55.

[0031] The conductive ring 4 is equipped with a conductive component 6. The conductive ring 4 guides the static charge to the electrostatic breakdown unit 5 through the conductive component 6. The conductive component 6 includes two conductive rods 61, both of which are U-shaped. One end of each of the two conductive rods 61 is fixedly connected to the outer wall of the conductive ring 4, and the opposite ends of the two conductive rods 61 are fixedly connected to a conductive post 62. The conductive post 62 penetrates the insulating block 51 and is fixedly connected to the bottom of the discharge cone 54. The static charge of the conductive ring 4 will move to the discharge cone 54 through the conductive rods 61.

[0032] The static eliminator 7 is installed inside the static breakdown unit 5. The static eliminator 7 discharges static charge. The static eliminator 7 includes a conductive frame 71 sleeved on the outside of the hollow steel ball 53, and the conductive frame 71 is fixedly installed on the top of the insulating block 51. A metal mesh cover 72 is fixedly installed on the top of the insulating block 51, and the hollow steel ball 53 is placed inside the metal mesh cover 72. A grounding pin 73 is fixedly inserted into the bottom of the insulating block 51. Both grounding pins 73 are in contact with the conductive frame 71. The grounding pins 73 are used to connect to the grounding wire, so that the static charge can be guided away and eliminated in time.

[0033] The semiconductor light-emitting component 3 includes a reflective cone 31 disposed inside the transparent lampshade 2. An insulating and heat-conducting base 32 is fixedly installed inside the reflective cone 31. A semiconductor light-emitting element 33 is installed on the top of the insulating and heat-conducting base 32. Conductive blocks 34 are disposed on both sides of the reflective cone 31 inside the transparent lampshade 2. Both conductive blocks 34 are electrically connected to the semiconductor light-emitting element 33 through conductive wires. Conductive pins 35 are fixedly installed at the bottom of both conductive blocks 34. The lower ends of both conductive pins 35 penetrate through the insulating base 1 and extend to the bottom of the insulating base 1. The interior of the reflective cone 31 is filled with fillers such as silicone to protect the semiconductor light-emitting element 33.

[0034] The mounting groove 52 has an annular exhaust groove 8 on its groove wall, and the inner wall of the conductive ring 4 has multiple dust blowing grooves 9. The upper side of the annular exhaust groove 8 has multiple connecting holes 10, and each connecting hole 10 is connected to the dust blowing groove 9. Through the annular exhaust groove 8 and the connecting holes 10, the airflow generated when the air is broken can be guided out in time, and the exhaust airflow can be used to blow away the dust that may be attached to the outer surface of the transparent lampshade 2, so as to avoid the dust affecting the light emission effect of the light-emitting diode.

[0035] The end face of the insulating base 1 is integrally formed with a heat-conducting column 11, which penetrates the reflective cone 31 and is fixedly connected to the bottom of the insulating heat-conducting base 32. Multiple heat dissipation columns 12 are fixedly installed at the lower outer edge of the insulating base 1. Through the contact between the heat-conducting column 11 and the insulating heat-conducting base 32, the heat generated by the semiconductor light-emitting element 33 during operation can be directly conducted to the insulating base 1 through the heat-conducting column 11. The multiple heat dissipation columns 12 at the bottom of the insulating base 1 can increase its contact area with the air, thereby improving the heat dissipation efficiency of the light-emitting diode and facilitating the stable operation of the light-emitting diode.

[0036] Insulating sleeves 13 are fixedly sleeved on the outer side walls of the two conductive pins 35, and the insulating sleeves 13 penetrate through the end face of the insulating base 1 and contact the bottom of the conductive block 34 on the same side. The insulating sleeves 13 can seal the connection between the conductive pins 35 and the insulating base 1 to prevent airflow from being discharged through the annular exhaust groove 8.

[0037] The operating principle of the present invention is explained as follows: The external power supply current supplies power to the semiconductor light-emitting component 3 through two conductive pins 35 and two conductive blocks 34. When the current flows through the semiconductor light-emitting component 3, the positively charged holes in the P region and the negatively charged electrons in the N region of the semiconductor light-emitting component 3 will diffuse towards each other under the action of the electric field. Near the PN junction, electrons and holes meet and recombine. Electrons jump from a high energy level to a low energy level, and excess energy is released in the form of photons, thereby realizing light emission. Under the action of the reflective cone 31, the light is concentrated and diffused outward from the top of the reflective cone 31.

[0038] During the use of photodiodes, static charges may be generated around the light-emitting diode due to vibration and other effects. The static charges will first come into contact with the transparent conductive coating on the side wall of the transparent lampshade 2 and the insulating base 1. Since the transparent conductive coating is in contact with the conductive ring 4, and the conductive ring 4 is in contact with the discharge tip 54 through the conductive rod 61 and the conductive post 62, according to the principle of electrostatic balance, the electric field strength on the conductor surface is proportional to the surface charge density. The discharge tip 54 has a large curvature and a relatively high charge density, which will generate a stronger electric field. Under the action of the strong electric field, the charge will be subjected to a greater electric force, making it easier to move and accumulate towards the discharge tip 54. Therefore, the static charges will be guided to the discharge tip 54. Thus, weak static charges in the environment will be attracted to the discharge tip 54, preventing weak static charges in the environment from directly invading the interior of the light-emitting diode and directly contacting the semiconductor light-emitting element 33, thereby affecting the light-emitting quality of the semiconductor light-emitting element 33.

[0039] When the static charge at discharge tip 54 reaches a certain intensity (at 10...), -7 C to 10 -6Within range C, the distance between the discharge tip 54 and the receiving tip 55 is less than 2 cm, when the static charge reaches 10. -7 C to 10 -6 At time C, and with the tip of the discharge cone 54 being sharp, according to the principle of cone discharge, the charge will concentrate on the cone, generating a strong electric field. According to the formula E=U / d, where E is the electric field strength, U is the voltage, and d is the distance (for a fixed charge, the smaller the distance d, the greater the electric field strength E between the discharge cone 54 and the receiving cone 55), the presence of the receiving cone 55 will influence the electric field distribution. The discharge cone 54, carrying static charge, has a concentrated charge distribution and a strong electric field. The presence of the receiving cone 55 on the other side further enhances the electric field strength between them. When this combined electric field strength exceeds the air breakdown field strength, the air is ionized, forming a conductive channel, allowing the statically charged discharge cone 54 to discharge. During discharge, the air breaks down, causing the air temperature and pressure at the breakdown location to rise. At this time, the air inside the hollow steel ball 53... The increased pressure causes the air inside the hollow steel ball 53 to flow outward through the exhaust hole 56. After passing through the metal mesh cover 72, the airflow is discharged through the annular exhaust groove 8, the connecting hole 10, and the dust blowing groove 9. The discharged airflow is blown towards the outer surface of the transparent lampshade 2 through the dust blowing groove 9, which can remove dust that can adhere to the surface of the transparent lampshade 2 to a certain extent, reducing the impact of dust on the light emission effect (the distance between the upper and lower walls of the annular exhaust groove 8 is less than 0.2 mm, the length, width, and height of the mounting groove 52 are all less than 1 cm, and the diameter of the dust blowing groove 9 is less than 0.1 mm. Because the space of the mounting groove 52 and the annular exhaust groove 8 is small, when the air is electrostatically broken down, the air pressure increases instantaneously. At this time, the air pressure in the mounting groove 52 and the annular exhaust groove 8 increases synchronously, which allows some air to be quickly discharged through the dust blowing groove 9, ensuring the cleaning effect of dust).

[0040] Secondly, when the airflow carrying static charge passes through the metal mesh cover 72, electrostatic induction occurs because the metal mesh cover 72 is a conductor. The free electrons in it move in a directional manner, generating induced charges. According to the principle that like charges repel and unlike charges attract, and the interaction between the electric field generated by the induced charges and the electric field of the static charges, plus the direct action of the electric field force on the static charges, the static charges in the airflow are subjected to a resultant force pointing towards the metal mesh cover 72, and are thus attracted by the metal mesh cover 72. The static charges attracted by the metal mesh cover 72 are grounded and led out through the conductive frame strip 71 at the bottom and the grounding pin 73, thereby achieving the purpose of eliminating static charges.

[0041] 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, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A light-emitting diode structure with electrostatic protection function, comprising an insulating base (1) and a transparent lampshade (2) mounted on the end face of the insulating base (1), wherein a semiconductor light-emitting component (3) is disposed inside the transparent lampshade (2), characterized in that, Also includes: A conductive ring (4) is fixedly sleeved on the outer side wall of the transparent lampshade (2), and the conductive ring (4) is fixedly connected to the top of the insulating base (1). The outer side wall of the transparent lampshade (2) and the side wall of the insulating base (1) are both coated with a transparent conductive coating. An electrostatic breakdown unit (5) is installed at the bottom of the insulating base (1). The conductive ring (4) is equipped with a conductive component (6). The conductive ring (4) guides the static charge to the electrostatic breakdown unit (5) through the conductive component (6). The static elimination unit (7) is installed inside the electrostatic breakdown unit (5) and discharges static charge.

2. The light-emitting diode structure with electrostatic protection function according to claim 1, characterized in that, The electrostatic breakdown unit (5) includes an insulating block (51). The bottom of the insulating base (1) is provided with an installation groove (52), and the insulating block (51) is fixedly connected to the groove of the installation groove (52). A hollow steel ball (53) is fixedly installed on the end face of the insulating block (51). The hollow steel ball (53) is provided with a discharge tip (54) and a receiving tip (55) inside. The discharge tip (54) is installed on the top of the insulating block (51) and does not contact the hollow steel ball (53). The receiving tip (55) is installed on the inner wall of the hollow steel ball (53). An exhaust hole (56) is provided on the side wall of the hollow steel ball (53).

3. The light-emitting diode structure with electrostatic protection function according to claim 2, characterized in that, The conductive component (6) includes two conductive rods (61), both of which are U-shaped. One end of each of the two conductive rods (61) is fixedly connected to the outer wall of the conductive ring (4), and the two conductive rods (61) are fixedly connected to a conductive post (62) at opposite ends. The conductive post (62) penetrates the insulating block (51) and is fixedly connected to the bottom of the discharge cone (54).

4. A light-emitting diode structure with electrostatic protection function according to claim 2, characterized in that, The static elimination unit (7) includes a conductive frame (71) sleeved on the outside of the hollow steel ball (53), and the conductive frame (71) is fixedly installed on the top of the insulating block (51). A metal mesh cover (72) is fixedly installed on the top of the insulating block (51), and the hollow steel ball (53) is located inside the metal mesh cover (72). A grounding pin (73) is fixedly inserted into the bottom of the insulating block (51), and both grounding pins (73) are in contact with the conductive frame (71).

5. A light-emitting diode structure with electrostatic protection function according to claim 1, characterized in that, The semiconductor light-emitting component (3) includes a reflective cone (31) disposed inside the transparent lampshade (2). An insulating heat-conducting base (32) is fixedly installed inside the reflective cone (31). A semiconductor light-emitting element (33) is installed on the top of the insulating heat-conducting base (32). Conductive blocks (34) are disposed on both sides of the reflective cone (31) inside the transparent lampshade (2). Both conductive blocks (34) are electrically connected to the semiconductor light-emitting element (33) through conductive wires. Conductive pins (35) are fixedly installed at the bottom of both conductive blocks (34). The lower ends of both conductive pins (35) penetrate the insulating base (1) and extend to the bottom of the insulating base (1).

6. A light-emitting diode structure with electrostatic protection function according to claim 2, characterized in that, The mounting groove (52) has an annular exhaust groove (8) on its groove wall, and the inner wall of the conductive ring (4) has multiple soot blowing grooves (9). The upper side of the annular exhaust groove (8) has multiple connecting holes (10), and each connecting hole (10) is connected to the soot blowing groove (9).

7. A light-emitting diode structure with electrostatic protection function according to claim 5, characterized in that, The insulating base (1) has an integrally formed heat-conducting column (11) on its end face, and the heat-conducting column (11) penetrates the reflective cone (31) and is fixedly connected to the bottom of the insulating heat-conducting base (32). Multiple heat dissipation columns (12) are fixedly installed at the lower outer edge of the insulating base (1).

8. A light-emitting diode structure with electrostatic protection function according to claim 5, characterized in that, An insulating sleeve (13) is fixedly sleeved on the outer side wall of both conductive pins (35), and the insulating sleeve (13) penetrates the end face of the insulating base (1) and contacts the bottom of the conductive block (34) on the same side.

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