CN201008221Y - High-brightness, high-efficiency LED lights - Google Patents

Abstract

This high-brightness, high-efficiency LED light is composed of battery B, thick film integrated circuit IC, electrolytic capacitors C ₁ , C ₂ , power switch K ₁ , dimming switch K ₂ and LED lights. The thick film integrated circuit IC is composed of switch type Composed of DC-DC conversion circuit and constant current circuit, the input end and output power end of the thick film integrated circuit are respectively connected with an electrolytic capacitor, the battery and power switch are connected in parallel with the input end electrolytic capacitor, and the controlled LED lights are connected in parallel On the output end, the gear selection terminal of the thick-film integrated circuit IC to control the intensity of the LED light corresponds to the dimmer switch K ₂ . In order to better solve the heat dissipation problem of high-power LEDs, a layer of heat-conducting silica gel is coated on the bottom surface of the LED heat sink, so that the bottom surface of the LED heat sink is closely connected with the cylindrical metal heat sink. The self-made thick-film integrated circuit IC of the utility model not only greatly improves the driving efficiency of the LED lamp, but also makes the input voltage range of the LED lamp very wide.

Description

High-brightness, high-efficiency LED lights

technical field

The utility model relates to an LED lamp, in particular to an LED lamp with high brightness and high efficiency.

Background technique

At the end of the last century, the advent of white high-brightness and ultra-high-brightness light-emitting diodes (LEDs) was a breakthrough in optoelectronic technology. Due to its small size, low power consumption, and long life (tens of times that of ordinary incandescent lamps), it has been widely used in various AC and DC lamps. However, due to the special driving characteristics of light-emitting diodes, it has not been widely promoted in the field of various lamps powered by batteries, such as flashlights, miner's lamps, head-mounted LED lights... and the like.

As we all know, the driving of LED is completely different from the driving of incandescent bulbs. Once the LED tube is turned on, its current increases sharply with the rise of voltage. For example, the current of an LED tube is only about 20mA at 3.0V, and the voltage increases to 3.7V. But the current suddenly increased to 800mA. A 0.7V increase in voltage results in a 40-fold increase in current! Therefore, in the LED lamp drive, especially the high-power LED tube drive, a current limiting circuit must be added to ensure that the voltage fluctuation is to ensure that the brightness of the LED lamp remains unchanged. The existing technology is to use an analog constant current circuit. Although this circuit can output a constant current, it consumes about 50% of the energy itself, which greatly reduces the advantages of high efficiency and energy saving of light emitting diodes.

Contents of the invention

The purpose of the utility model is to fundamentally solve the driving problem of the above-mentioned light-emitting diodes, and provide a light-emitting diode lamp which is especially suitable for long-term use in various occasions and can completely replace ordinary light bulbs.

The utility model is a high-brightness, high-efficiency LED lamp, which is characterized in that it is composed of a battery, a special thick-film integrated circuit, an electrolytic capacitor, a power switch, a dimming switch and a light-emitting diode, and the special thick-film circuit is a An integrated circuit composed of a switching DC-DC conversion circuit and a constant current circuit. The input and output power terminals of the integrated block are respectively connected to electrolytic capacitors. After the battery and power switch are connected in series, they are connected in parallel with the input electrolytic capacitor. The control LED lights are connected in parallel, and the gear selection terminal of the thick film circuit IC to control the intensity of the LED lights corresponds to the dimmer switch K ₂ .

Because the self-made thick film integrated circuit in the utility model adopts a switch type constant current circuit, the driving efficiency of the LED lamp is greatly improved, from usually less than 50% to about 80%, which completely solves the problem of mass promotion and application of LED lamps. At the same time, it also solves the wide-range input of power supply voltage and constant current control, so that the input voltage of the LED lamp using the utility model is very wide, and it is raised from 1.2V (one Ni-MH rechargeable battery) to 15V ( 10 ordinary batteries).

Since high-power light-emitting diodes (more than 1W) have more energy converted into heat, the heat dissipation of high-power light-emitting diodes has become a difficult problem to overcome. In order to solve the heat dissipation problem of high-power light-emitting diodes of high-brightness and high-efficiency LED lamps, the utility model closely connects the bottom surface of the high-power light-emitting diode heat sink with a cylindrical metal heat sink, and coats the bottom surface of the light-emitting diode heat sink. The measure of applying a layer of thermal silica gel solves the problem.

The utility model better solves the heat dissipation problem of the high-power light-emitting diodes, improves the working environment of the high-power light-emitting diodes, thereby greatly increasing the continuous use time of the lamps and greatly prolonging the service life of the light-emitting diodes.

Description of drawings

Fig. 1 is the driving control circuit diagram of the utility model high-brightness, high-efficiency LED lamp

Figure 2 is a schematic diagram of the internal structure of the self-made thick film circuit

Figure 3 is a schematic cross-sectional structure diagram of a high-power light-emitting diode closely connected with a cylindrical metal radiator

Detailed ways

Example 1

As shown in Figure 1, this high-brightness, high-efficiency LED lamp is composed of a battery B, a dedicated thick film circuit IC, an electrolytic capacitor C ₁ , a power switch K ₁ , a dimming switch K ₂ and an LED tube. The input terminal and the output power supply terminal are respectively connected to the electrolytic capacitor, wherein, the input terminal 1 is connected to the electrolytic capacitor C ₁ , the battery B and the power switch K ₁ are connected in parallel with the input terminal electrolytic capacitor C ₁ , and the controlled LED lights are connected in parallel to Output terminals 7, 8, output power supply terminal 2 are connected to the electrolytic capacitor C ₂ ; pin 3 is the ground terminal, connected to the negative pole of the battery B and the electrolytic capacitor; thick film circuit IC controls the gear selection terminal 4, 5, 6 corresponds to the dimmer switch K ₂ respectively, and the IC provides different output currents to adjust the different luminous intensities of the LED lamps.

As shown in Figure 2, the dedicated thick film circuit IC is an integrated block composed of a switch-type DC-DC conversion circuit and a constant current circuit. The left side is the pump circuit PP, which realizes the DC-DC boost function, and the right side is the constant current circuit CC. The thick film circuit IC not only greatly improves the driving efficiency of the LED lamp, but also makes the input voltage range of the LED lamp very wide.

In Fig. 3, the heat sink 1 of the high-power LED lamp 4 has the same area as the cylindrical heat-conducting metal body 3, and a layer of heat-conducting silica gel 2 is coated on the heat sink 1 of the LED lamp 4 to make the excess heat accumulated on the high-power LED lamp 4 The heat converted from energy is directly transferred to the cylindrical heat-conducting metal body 3 through the heat-conducting silica gel 2, so that the heat on the high-power LED lamp can be cooled in time, thereby greatly increasing the continuous use time of the lamp and greatly extending the service life of the light-emitting diode .

Claims (2)

1. a high brightness, high-efficiency LED lamp is characterized in that by battery B, special-purpose thick film circuit IC, electrolytic capacitor C ₁, C ₂, mains switch K ₁, dimmer switch K ₂Constitute with the LED lamp, described special-purpose thick film circuit IC is an integrated package of being made up of switching mode DC-DC translation circuit and constant-current circuit, the input of this integrated package and out-put supply end are connected with electrolytic capacitor respectively, battery and mains switch series connection back are in parallel with the input electrolytic capacitor, output be subjected to controlled LED lamp in parallel, the gear of thick film circuit IC control LED intensity of light is selected terminal and dimmer switch K ₂Corresponding.

2. high brightness according to claim 1, high-efficiency LED lamp, it is characterized in that when the LED lamp is large-power light-emitting diodes, the bottom surface of its fin and cylindrical metal radiator close proximity, the coated on bottom side of LED heat radiating sheet is covered with one deck heat conductive silica gel.

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