Low-voltage LED lamp with constant-current effect

Abstract

The utility model provides a low-voltage LED lamp with a constant current effect, which is characterized in that the low-voltage LED lamp comprises a constant current CRD which has a constant current function, is connected with a load to provide a constant path current, and is connected with a constant current source to improve a power factor; the constant-voltage power supply is used for providing constant voltage and fluctuating current; the constant-current capacitor can be connected with the constant-current CRD to form constant voltage and current for a load; the constant-current power supply is used for providing constant current and fluctuation voltage; the constant-current capacitor can be connected with the constant-current CRD and then connected to commercial power to form constant voltage and current for a load; and the LED group comprises a plurality of LED lamps, and the LED lamps can be freely connected in series and in parallel when being matched with the constant-current CRD.

Description

Technical Field

[0001] The utility model relates to the technical field of LED lighting control, in particular to a low-voltage LED lamp with a constant current effect. Background Art

[0002] LED light sets are frequently used in daily life, such as large searchlights, desktop atmosphere lights, daily lighting, etc. They are usually connected to the mains by a constant current source, and a constant current but not constant voltage working power source is obtained through the constant current source. However, in actual long-term use, due to the unstable fluctuation of the grid voltage, the LED chip cannot obtain a stable working voltage, resulting in damage to the LED light source chip. The constant current power supply does not have constant control over the voltage, which causes unstable fluctuations in the lighting degree of the LED light set, resulting in flickering or low voltage dimming, etc. The long-term impact of unstable current on the LED lamp will accelerate the aging of the LED lamp and even cause the risk of short circuit. In addition, the market often uses constant current adjustment for LED circuits, but when multiple load LEDs of different specifications are connected in the same circuit, due to different load rated parameters, multiple light sets cannot be fully lit, and cannot be applied to the integrated line control of the overall home appliance. The cost of designing a separate constant current and voltage condition for a single electric light element is extremely high, which greatly reduces the applicability of ordinary LED lamps.

[0003] To achieve the above objectives, the utility model provides a low-voltage LED lamp with a constant current effect, which can solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model adopts the following technical solutions to achieve:

[0005] A low-voltage LED lamp with a constant current effect, comprising a constant current module, an LED lamp, and a constant voltage power supply, wherein the constant voltage power supply and the constant current module are used to connect the LED lamp to provide a constant voltage and current, and the LED lamp is composed of a plurality of light-emitting diode strings connected in parallel;

[0006] The constant current module includes a constant current CRD, and the constant current CRD can provide a stable current.

[0007] The constant current CRD is a single crystal element, and the rated current range of a single constant current CRD diode is 100mA-220mA;

[0008] The operating voltage of the LED lamp is 3V-48V, and the LED lamp is a low-voltage lamp;

[0009] The constant current CRD is connected to a single LED lamp and then connected to the circuit.

[0010] The constant current value I after multiple constant current CRDs are connected in parallel 总 =nI crd .

[0011] Preferably, the constant current value of a single constant current CRD varies with temperature.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model mainly applies constant voltage and constant current to LED lamp groups containing CRD devices. The CRD constant current diode element used in the utility model is crystal-shaped and can play a role of constant current for the load in the circuit. It has two new application modes:

[0014] 1. When CRD components are directly connected to a constant voltage source to form a group, different degrees of constant current effects can be formed by connecting multiple CRD devices, so that the lighting power requirements of the single high-power LED lamps connected on the line can be met. By utilizing the load characteristics of the constant voltage power supply, it can be widely used in the line assembly of high-power LED lamps, and the constant current and constant voltage state can always maintain a high power factor, and can maintain the stability of the circuit current and voltage of the load in various states, with a strong energy-saving effect; in addition, it can also be used for multiple LED lamp groups with the same specifications and power parameters to improve the power stability of multiple lamp groups;

[0015] 2. Directly connect the load LED lamp to the CRD device, and directly connect the LED lamp and the CRD element into a group. The CRD device increases the path current of the load LED lamp. It is suitable for connecting multiple LED lamps in groups at the same time. Due to their different rated powers, the shunt current values ​​are also different, which may cause them to fail to light up normally or have insufficient brightness. At this time, the CRD element adapted to the single load is adapted and connected between the single LED lamp and the circuit, so that the current value of the LED load reaches its rated power value, so that its single LED lamp can balance the path voltage and path current, thereby effectively lighting a group of LED lamp loads with different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the volt-ampere characteristic of the constant current CRD of the utility model;

[0017] Figure 2 This is a connection diagram of the constant voltage source, CRD, and LED of the utility model; DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly connected by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Please refer to the attached Figure 1 A low-voltage LED lamp with a constant current effect, comprising a constant current module, an LED lamp, and a constant voltage power supply, wherein the constant voltage power supply and the constant current module are used to connect the LED lamp to provide a constant voltage and current, and the LED lamp is composed of a plurality of connected light-emitting diode strings; the constant current module comprises a constant current CRD, and the constant current CRD can provide a stable current, and the constant current CRD is a single crystal element, and the rated current range of a single constant current CRD diode is 100mA-220mA; the working voltage of the LED lamp is 3V-48V, and the LED lamp is a low-voltage lamp; after the constant current CRD is connected to the single LED lamp and connected to the circuit The constant current value I after connecting multiple constant current CRDs 总 =nI crd ; The constant current value of the constant current CRD changes with temperature.

[0023] This utility model has a variety of mainstream implementation effects: reference Figure 1When the voltage applied to both ends of the constant current diode is within the range of 1.5v-48v, the current flowing through the diode is basically unchanged, that is, it plays a constant current role. First, when the CRD constant current diode is directly connected to the constant voltage power supply, the constant voltage power supply can use the mainstream DC power supply on the market. The CRD constant current diode devices are integrated and arranged through the aluminum substrate and connected to the constant voltage power supply output circuit. When producing the CRD element, the specifications of its single device are strictly controlled. After the CRD constant current diode devices are matched and grouped and placed on the aluminum substrate, the output circuit is configured for each group of CRD constant current diode groups with different connection modes. The coordinated current regulation efficiency of different tube groups is different. After a single LED lamp is connected to a CRD constant current element with an adaptive power supply, its circuit current is stabilized. When a traditional switching voltage-stabilized power supply is used, the circuit current and voltage of a single lamp source are stabilized, thereby improving the brightness stability of the single LED lamp source and extending its life.

[0024] The LED lamp and the constant current CRD are directly combined to form a low-voltage lamp. By connecting an adapted constant current CRD device group to the lamp holder, the constant current value formed can light up the LED lamp within the normal power range.

[0025] Another application effect can be achieved. When some high-power LED lamps on the market are in use, a higher current is required to be used normally, which makes the power supply requirements of the working circuit of a single high-power lamp source higher. When a combined constant-current CRD is used to access a voltage-stabilized power supply circuit, a higher circuit current is provided by the constant-current CRD, so that a high-power LED lamp can be normally lit using a lower DC voltage.

[0026] The second application example is as follows. When the physical light source is used for the overall house lighting decoration, it is often encountered that when multiple power and different specifications of LED lamps are connected to the same channel at the same time, due to different specifications, the load current value obtained by the LED lamp shunting will also be different, resulting in different power effects of lighting the lamp beads. Occasionally, the LED lamp cannot be lit due to low power, and the power factor fluctuates greatly in this state, which is not conducive to the life of the LED. After the current mains power is input into the conventional lamp circuit, the channel current tends to be constant, but the power is determined by the load of each LED lamp. Connecting a constant current CRD device to the input end of a single LED can increase and keep the current flowing through a single LED lamp constant, so that the LED lamp is lit within the normal power range and is not affected by the parallel shunting. As a result, the power of the LED lamp source that cannot be lit by the single unit reaches the rated power adaptation range and is lit normally, reducing the damage of the lamp, frequent flickering, and various problems such as insufficient light power and dark light;

[0027] When CRD devices are directly connected to a single LED lamp to form a group, the actual power effect of the LED can be improved by simply increasing or reducing the individual use of CRD devices. The voltage-boosting effect of connecting multiple CRD devices changes the voltage supply of the LED lamp, allowing multiple LED lamps of different specifications to be connected to the same low-voltage circuit for operation.

[0028] At the same time, the application scope of the utility model is expanded. The city power transmission has a certain step-up and step-down cost, but portable power sources such as storage batteries, cylinder generators and mechanical generators have certain limitations. However, through the convenient application method of the utility model, the CRD device can accurately improve the power effect of the single light source and the light string group, and it can be completely realized that the light source can still achieve a higher power effect under the condition of lower voltage input, so that the conventional LED light group can be applied to more places without power supply;

[0029] In addition, portable power supplies are socially common and are high-incidence equipment. With the cooperation of the present invention, the application scope of safe power supply equipment with an output of 48V or less can be greatly broadened, so that the rated power of the LED can be achieved only through the safe output voltage.

[0030] As the voltage and current tend to be constant, the output power factor of the circuit will also be higher. When the current and voltage are completely constant, the power factor tends to 100%. Therefore, the power factor change of the circuit can also change only with the temperature rise, which has obvious reference.

[0031] The above description of the utility model in combination with the accompanying drawings is an exemplary description. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as the non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A low voltage LED lamp with constant current effect, characterized in that: It includes a constant current module, an LED lamp, and a constant voltage power supply. The constant voltage power supply and the constant current module are used to connect the LED lamp to provide constant voltage and current. The LED lamp is composed of multiple groups of light-emitting diode strings connected in parallel. The constant current module includes a constant current CRD, and the constant current CRD can provide a stable current. The constant current CRD is a single crystal element, and the rated current range of a single constant current CRD diode is 100mA-220mA; The operating voltage of the LED lamp is 3V-48V, and the LED lamp is a low-voltage lamp; The constant current CRD is connected to a single LED lamp and then connected to the circuit. The constant current value I after multiple constant current CRDs are connected in parallel 总 =nI crd .

2. A low-voltage LED lamp with constant current effect according to claim 1, characterized in that: The constant current value of a single constant current CRD changes with temperature.

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