CN205919163U - LED photovoltaic module and LED lamps and lanterns - Google Patents

Abstract

The utility model discloses an LED photoelectric module and an LED lamp, belonging to the field of photoelectric technology. The LED photoelectric module includes: a substrate, a plurality of ring-shaped light strings arranged on the surface of the substrate, and a driving unit arranged in the central area of the substrate within the ring-shaped light strings, and the driving unit drives the plurality of ring-shaped light strings. Ring light strings and adjust the brightness or color temperature of each ring light string. The LED photoelectric module and the LED lamp with the LED photoelectric module of the utility model have adjustable brightness or color temperature, and have the advantages of good heat dissipation, uniform light mixing and low cost.

Description

LED photoelectric modules and LED lamps

technical field

The utility model relates to the field of optical technology, in particular to an LED photoelectric module and an LED lamp.

Background technique

Due to the advantages of environmental protection, long service life, energy saving, stable performance, high luminous efficiency and small size, LED light sources have been widely used in various lighting fields, such as indoor lighting, automobiles, and consumer electronics.

At present, with the rapid development of LED technology, LED light sources have been widely used in high-power lighting equipment. However, the current high-power lighting requires a large number of LEDs, some as many as hundreds. Recently, a kind of LED photoelectric module has been widely used. The LED photoelectric module includes a circular substrate and an LED drive unit and LED lights are arranged on the circular substrate. The circuit includes the LED driver chip and the LED lamp. It only needs to be installed on the base of the LED lighting equipment and assembled with the lampshade. There is no need to think too much about the circuit design of the LED, and the production and assembly are convenient.

With the wide application of LED lights in production and life, the functional requirements for LED lights are also increasing. For example, in an application scenario, it is necessary to adjust the brightness or color temperature of the LED lamp. However, the brightness or color temperature of existing LEDs are constant and cannot be adjusted.

Therefore, it is necessary to propose a new solution to solve the above problems.

Utility model content

Based on one or more of the above problems, the utility model provides an LED photoelectric module and an LED lamp to solve the problems of unadjustable brightness or color temperature, poor heat dissipation and high cost in the production of LED photoelectric modules in the prior art.

The utility model provides an LED photoelectric module, a substrate, a plurality of ring-shaped light strings arranged on the surface of the substrate, and a driving unit arranged in the central area of the substrate and located in the ring-shaped light string. The driving unit drives The plurality of ring-shaped light strings also adjust the brightness or color temperature of each ring-shaped light string.

Further, the substrate is circular, and the peripheral edge of the substrate is provided with a first ring-shaped light string and a second ring-shaped light string, the first ring-shaped light string includes N first lamp beads connected in series, and the second The ring-shaped light string includes N second lamp beads connected in series, one first lamp bead and one second lamp bead form a lamp bead pair, and each lamp bead pair is located on the same radius of the circular substrate, where N is a natural number , and N>1.

Further, the first lamp bead is an SMD2835 lamp bead, the reverse voltage is 18V, the forward current is 30MA, and the warm white temperature is 2800-3200K; the second lamp bead is an SMD2835 lamp bead, and the reverse voltage is 18V , the forward current is 30MA, and the positive white temperature is 5500-6500K.

Further, the photoelectric module further includes fixing holes arranged on the substrate, and the fixing holes are evenly distributed around the central through hole.

Further, the drive unit includes a power access terminal, a rectifier module, a discharge module, a chip resistor, a chip capacitor and a drive chip, and the power supply terminal receives an external current and converts it into a direct current through the rectifier module, and then flows into the discharge module , SMD resistors, SMD capacitors and driver chips.

Further, the power input end includes a live wire end and a neutral wire end, and a power line for transmitting external current is connected to the corresponding live wire end and the neutral wire end through the central through hole.

Further, the drive chip is one, the first ring-shaped light string is connected to the second output pin (OUT2) of the drive chip, and the second ring-shaped light string is connected to the first output pin of the drive chip pin (OUT1), the third chip resistor (R3) is connected to the power input pin (VIN) of the driver chip, and the second chip select signal pin (CS2) of the driver chip passes through the second chip The resistor (R2) is grounded, the first chip select signal pin (CS1) of the driver chip is grounded through the first chip resistor (R1) and the second chip resistor (R2), and the first power port of the driver chip (VDD) and the second power port (VCC pin) are grounded through the first capacitor (C1) and the second capacitor (C2) respectively.

Further, the driving chip includes a first driving chip and a second driving chip, and the first ring-shaped light string and the second ring-shaped light string are connected to the first output pins of the first driving chip and the second driving chip respectively. (OUT1) is connected to the second output pin (OUT2), and the third chip resistor (R3) and chip resistor R6 connected in parallel are respectively connected to the power input pins (VIN) of the first driver chip and the second driver chip. connected, the second chip select signal pin (CS2) of the first driver chip is grounded through a resistor R2, and the first chip select signal pin (CS1) of the first driver chip is grounded through a first chip resistor (R1) and R2 are grounded, the first power supply port (VDD) and the second power supply port (VCC pin) of the first driver chip are respectively grounded through the first capacitor (C1) and the second capacitor (C2), and the second driver chip The second chip select signal pin (CS2) of the chip is grounded through the fifth resistor (R5), and the first chip select signal pin (CS1) of the second driver chip is grounded through the fourth resistor and the fifth resistor, and the The first power supply port (VDD) and the second power supply port (VCC pin) of the second driving chip are respectively grounded through the third capacitor (C3) and the fourth capacitor (C4).

Further, by controlling the on/off switch of the power switch within 0.3 seconds to 3 seconds, the drive unit turns on and off two parallel LED light strings of different colors to adjust the color temperature.

The utility model also provides an LED lamp, which includes the LED photoelectric module described in any one of the above, and the LED lamp is a downlight, a bulb lamp, a ceiling lamp or an LED fluorescent lamp.

The LED photoelectric module and the LED lamp of the utility model can adjust brightness or color temperature, and have the beneficial effects of good heat dissipation, uniform light emission, and low production cost.

Description of drawings

Fig. 1 is a schematic structural view of an LED photoelectric module in a preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of the drive unit of the preferred embodiment of the present invention.

Fig. 3 is another structural schematic diagram of the drive unit of the preferred embodiment of the present invention.

detailed description

The utility model is described in detail below in conjunction with accompanying drawing and embodiment. It should be noted that, if there is no conflict, the embodiments of the present invention and various features in the embodiments can be combined with each other, and all are within the protection scope of the present invention.

Please refer to Fig. 1, Fig. 1 is a schematic structural view of the LED photoelectric module of the preferred embodiment of the utility model, as shown in Fig. 1, the LED photoelectric module of the preferred embodiment of the utility model includes: a substrate 1, arranged on the The plurality of ring-shaped light strings 2 on the substrate 1 are arranged in a drive unit located in the center area of the substrate 1 inside the ring-shaped light string 2. The center of the substrate 1 is provided with a central through hole 4, and the drive unit drives the The multiple ring-shaped light strings 2 are described and the brightness or color temperature of each ring-shaped light string 2 is adjusted. Wherein, the substrate 1 may be in a regular geometric shape such as square, circular, or elliptical, or in an irregular geometric shape, which is not specifically limited in the present invention.

The LED photoelectric module provided by the utility model has a simple structure and is convenient for mass production. The drive unit can change the magnitude of the output current sequentially according to turning on and off the power switch, thereby changing the brightness of the LED light string. In addition, according to turning on and off the power switch, the switching states of the two output ports can be changed sequentially, so as to achieve the purpose of adjusting the color temperature by alternately turning on and off the two LED light strings of different colors. Preferably, by controlling the on/off switch of the power switch within 0.3 seconds to 3 seconds, the drive unit turns on and off two parallel LED light strings of different colors to adjust the color temperature.

In a specific embodiment, the substrate 1 is circular, and the peripheral edge of the substrate 1 is provided with a first ring-shaped light string 21 and a second ring-shaped light string 22, and the first ring-shaped light string 21 includes N a first lamp bead 211, the second annular lamp string 22 includes N second lamp beads 221 connected in series, one first lamp bead 211 and one second lamp bead 221 form a lamp bead pair 23, each lamp bead pair 23 are located on the same radius of the circular substrate 1 . Wherein, N is a natural number, and N>1.

Exemplarily, the first lamp bead 211 is an SMD2835 lamp bead, the reverse voltage is 18V, the forward current is 30MA, and the warm white temperature is 2800-3200K; the second lamp bead 221 is an SMD2835 lamp bead, and the reverse The voltage is 18V, the forward current is 30MA, and the positive white temperature is 5500-6500K.

Further, the photoelectric module further includes fixing holes 5 arranged on the substrate 1 , and the fixing holes 5 are evenly distributed around the central through hole 4 .

The drive unit includes a power supply terminal, a rectifier module DB1, a discharge module R3, first chip resistors (R1), R2, chip capacitors C1, C2 and a driver chip U. The power input terminal receives external current and converts it into direct current through the rectifier module, and then flows into the discharge module, chip resistors, chip capacitors and driver chips.

Wherein, the power input terminal includes a live wire terminal L and a neutral wire terminal N, and a power line for transmitting external current is connected to the corresponding live wire terminal L and the neutral wire terminal N through the central through hole 4 . The model of the driver chip U is CYT8000A.

The driving unit in FIG. 1 can use one driving chip U or a parallel connection of multiple driving chips U. In a specific implementation manner, as shown in FIG. 2, the driver chip U is one, denoted as U1, and the live wire terminal L is connected to the first end of the rectifier module DB1 through a switch T and a fuse F1, so The neutral terminal N is connected to the second end of the rectification module DB1, the third end of the rectification module DB1 is grounded, and the fourth end of the rectification module DB1 is respectively connected to the first ring-shaped light string 21, the second The ring-shaped light string 22 is connected to the third chip resistor (R3), the first ring-shaped light string 21 is connected to the second output pin (OUT2) of the driver chip U1, and the second ring-shaped light string 22 is connected to the The first output pin (OUT1) of the driver chip U1 is connected, the third chip resistor (R3) is connected to the power input pin (VIN) of the driver chip U1, and the second chip of the driver chip U1 The selection signal pin (CS2) is grounded through the second chip resistor (R2), and the first chip selection signal pin (CS1) of the driver chip U1 is connected to the ground through the first chip resistor (R1) and the second chip resistor ( R2) is grounded, and the power port (VDD) and VCC pin of the driver chip U1 are grounded through the chip capacitor C1 and the chip capacitor C2 respectively.

The driver chip U is an LED constant current driver chip that can adjust the brightness/color temperature in 3 stages, and is suitable for the input voltage of AC voltage 200V~240V or 90V~130V. Its constant current accuracy is less than ±3%. When the driver chip U is used in the application of 3-stage brightness adjustment, it can automatically change the output current according to turning on or off the power switch, thereby changing the brightness of the LED light. The adjustment ratio can be adjusted through an external CS resistor.

When the driver chip U is used in the application of 3-stage color temperature adjustment, the switch status of the two output ports can be changed sequentially according to the power switch being turned on or off, so as to realize the alternate lighting and extinguishing of the two LED lights of different colors to achieve the purpose of adjusting the color temperature, and adjust the external REXT The resistor can adjust the output power.

The overall design and structure of the driver chip U is simple and has various protection functions. It does not need transformers and high-voltage electrolytic capacitors. The high-voltage LED driver chip only needs very few peripheral components, and can realize all SMT processing and fully automatic operations.

The main features of the driver chip U are no need for transformers and electrolytic capacitors; input AC voltage 220V, 110V; integrated high-voltage start-up power supply; can achieve 3-stage brightness adjustment, and the adjustment ratio can be set externally; dimming ratio: 100%--50%--X % or X%--50%--100%; switching within 0.5 seconds to 3 seconds, supporting fast switching; inter-chip current deviation <± 3%; power factor > 0.9; THD: <20%; with temperature Automatic adjustment function; chip application system has no EMI problem; package form ESOP8.

The principle of the drive unit in Fig. 2 is as follows: the alternating current flows into the rectifier module DB1 from the L terminal and the N terminal of the AC power input terminal, and after being converted into direct current by the rectifier module DB1, it flows into the first ring-shaped light string 21 and the second ring-shaped light string 22 , and then flows into the driver chip U1 after passing through the first and second ring-shaped light strings. The LED driving chip U1 serves as the current driving control unit of the first and second ring-shaped light strings. In Fig. 2, R1=R2=10Ω, the switching cycle is greater than 0.3 seconds and less than 3 seconds. When the switch is turned on for the first time, the output average current I _OUT2 = 30mA; when the switch is turned on for the second time, the output average current I _OUT1 = I _OUT2 = 15mA, and the total output current is 30mA; when the switch is turned on for the third time, the output average current I _OUT1 = 30mA. When the switching cycle is longer than 3 seconds, the initial state is restored, and the average output current I _OUT2 =30mA.

In another specific embodiment, as shown in FIG. 3, the driver chip U includes a first driver chip U2 and a second driver chip U3, and the live wire terminal L is connected to the rectifier module DB1 through a switch T and a fuse F1. The first end is connected, the neutral terminal N is connected to the second end of the rectification module DB1, the third end of the rectification module DB1 is grounded, and the fourth end of the rectification module BD1 passes through the first ring-shaped light string 21 connected in parallel. and the second ring-shaped light string 22 are respectively connected to the first output pin (OUT1) and the second output pin (OUT2) of the first driver chip U2 and the second driver chip U3, and the fourth terminal of the rectification module DB1 The third chip resistor (R3) and chip resistor R6 connected in parallel are respectively connected to the power input pins (VIN) of the first driver chip U2 and the second driver chip U3, the first driver chip U2 of the first driver chip U2 The second chip selection signal pin (CS2) is grounded through the resistor R2, and the first chip selection signal pin (CS1) of the first driver chip U2 is grounded through the first patch resistor (R1) and R2, and the first driver The power supply port (VDD) and the VCC pin of the chip U2 are grounded through the chip capacitor C1 and the chip capacitor C2 respectively, and the second chip select signal pin (CS2) of the second driver chip U3 is connected to the ground through the fifth resistor (R5) Grounded, the first chip select signal pin (CS1) of the second driver chip U3 is grounded through chip resistors R4 and R5, and the power port (VDD) and VCC pin of the second driver chip U3 are connected through chip resistors R4 and R5 respectively. Capacitor C3 and chip capacitor C4 are grounded.

The principle of the drive unit in Figure 3 is as follows: the alternating current flows into the rectifier module DB1 from the L terminal and the N terminal of the AC power input terminal, and after being converted into DC by the rectifier module DB1, it flows into the first ring light string and the second ring light string, and then passes through The first and second ring-shaped light strings then flow into the parallel-connected driver chips U2 and U3. The driving chips U2 and U3 are connected in parallel as the current driving control unit of the first and second ring-shaped light strings. The driver chip U2 and the LED driver chip U3 belong to driver chips with the same structure.

In Figure 3, the first chip resistor (R1), R4 = 100Ω, R2, R5 = 10Ω, the switching cycle is greater than 0.3 seconds and less than 3 seconds, when the switch is turned on for the first time, the output current I _OUT = 60mA; When the switch is turned on, the output current I _OUT =30mA; when the switch is turned on for the third time, the output current I _OUT =6mA. The dimming ratio is 100%, 50%, 10%. When the switching period is longer than 3 seconds, the initial state is restored, and the output current I _OUT =60mA.

Furthermore, the photoelectric module of the present invention is applied to downlights and bulb lamps, and is combined with a base and a lampshade as a light source.

The utility model also provides an LED lamp, which includes any one of the above-mentioned LED photoelectric modules.

It should be noted that: in this utility model, the mentioned drive unit mainly refers to the circuit elements occupying a certain space in the drive unit. Part of the surface area of the substrate will affect the uniformity of light output and heat dissipation of LED lamp beads on a circular or circular substrate with limited size. Therefore, whether the arrangement of these circuit components on a circular or circular substrate is reasonable may cause LED damage. The light emission of the photoelectric module may even seriously affect the service life of the LED photoelectric module. In addition, in order to ensure the heat dissipation of the LED photoelectric module, the annular or circular substrate is an aluminum substrate with good heat dissipation or an insulating heat-conducting substrate.

In addition, it needs to be specially noted that, due to the small distance (ie thickness) between the upper surface and the lower surface of the substrate, usually this thickness is between 0.1 mm and 5 mm, and this utility model does not involve this thickness, mainly Describe the LED drive unit on the circular substrate and the shape, structure and other characteristics of the LED lamp. Therefore, when the geometric structure of the substrate is circular or ring-shaped, the description directly looks at the plane circle or ring. For the description, for example, the center of the circular substrate is directly used, but actually refers to the center point of the surface of the circular substrate on which the LED driving unit and the LED lamp are disposed.

The above is only the embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process conversion made by using the description of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (10)

1. An LED photoelectric module, characterized in that it comprises: a substrate, a plurality of ring-shaped light strings arranged on the surface of the substrate, and a drive unit arranged in the central area of the substrate within the ring-shaped light strings, the A central through hole is provided at the center of the substrate, and the drive unit drives the plurality of ring-shaped light strings and adjusts the brightness or color temperature of each ring-shaped light string. 2. The LED optoelectronic module according to claim 1, wherein the substrate is circular, a first ring-shaped light string and a second ring-shaped light string are arranged on the peripheral edge of the substrate, and the first ring-shaped light The string includes N first lamp beads connected in series, and the second ring-shaped lamp string includes N second lamp beads connected in series. One first lamp bead and one second lamp bead form a pair of lamp beads, and each pair of lamp beads is located at On the same radius of the circular substrate, wherein, N is a natural number, and N>1. 3. The LED photoelectric module according to claim 2, wherein the first lamp bead is an SMD2835 lamp bead, the reverse voltage is 18V, the forward current is 30MA, and the warm white temperature is 2800-3200K; The second lamp bead is an SMD2835 lamp bead, the reverse voltage is 18V, the forward current is 30MA, and the positive white temperature is 5500-6500K. 4 . The LED optoelectronic module according to claim 3 , wherein the optoelectronic module further comprises fixing holes arranged on the substrate, and the fixing holes are evenly distributed around the central through hole. 5. The LED optoelectronic module as claimed in claim 1, wherein the drive unit includes a power access terminal, a rectifier module, a discharge module, chip resistors, chip capacitors and a driver chip, and the power access The terminal receives external current and converts it to DC through the rectifier module, and then flows into the discharge module, chip resistors, chip capacitors and driver chips. 6. The LED photoelectric module according to claim 5, wherein the power input terminal includes a live wire end and a neutral wire end, and the power line for transmitting external current is connected to the corresponding live wire end through the central through hole. , The neutral terminal is connected. 7. The LED photoelectric module as claimed in claim 6, wherein the driver chip is one, and the first ring-shaped light string is connected to the second output pin (OUT2) of the driver chip, so The second ring-shaped light string is connected to the first output pin (OUT1) of the driver chip, the third patch resistor (R3) is connected to the power input pin (VIN) of the driver chip, and the driver chip The second chip select signal pin (CS2) is grounded through the second chip resistor (R2), and the first chip select signal pin (CS1) of the driver chip is grounded through the first chip resistor (R1) and the second chip resistor (R1). The resistor (R2) is grounded, and the first power port (VDD) and the second power port (VCC pin) of the driver chip are respectively grounded through the first capacitor (C1) and the second capacitor (C2). 8. The LED photoelectric module according to claim 6, wherein the driver chip comprises a first driver chip and a second driver chip, and the first ring-shaped light string and the second ring-shaped light string are respectively connected to the The first output pin (OUT1) and the second output pin (OUT2) of the first driver chip and the second driver chip are connected, and the third chip resistor (R3) and chip resistor R6 connected in parallel are respectively connected to the first The power input pin (VIN) of the driver chip and the second driver chip is connected, and the second chip select signal pin (CS2) of the first driver chip is grounded through a resistor R2, and the first chip select signal pin (CS2) of the first driver chip is grounded. The signal pin (CS1) is grounded through the first chip resistor (R1) and R2, and the first power port (VDD) and the second power port (VCC pin) of the first driver chip are respectively passed through the first capacitor (C1 ) and the second capacitor (C2) are grounded, the second chip select signal pin (CS2) of the second driver chip is grounded through the fifth resistor (R5), and the first chip select signal pin of the second driver chip (CS1) is grounded through the fourth resistor and the fifth resistor, and the first power port (VDD) and the second power port (VCC pin) of the second driver chip are respectively passed through the third capacitor (C3) and the fourth capacitor ( C4) ground. 9. The LED photoelectric module according to claim 1, characterized in that, by controlling the on/off switching of the power switch within 0.3 seconds to 3 seconds, the drive unit alternately connects two parallel LED light strings of different colors Turn on and off to adjust the color temperature. 10. An LED lamp, characterized in that it comprises the LED photoelectric module according to any one of claims 1-9, and the LED lamp is a downlight, a bulb lamp, a ceiling lamp or an LED fluorescent lamp.