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AC LED lighting lamp

A technology for LED lighting and LED filament, which is applied in lighting devices, lighting and heating equipment, and lamp circuit layout, etc., can solve the problems of high-cost popularization and promotion of switching circuits, difficulty in balancing current density, and high cost of driving circuits, and achieves a high cost. Conducive to flexible application, avoiding low life and easy decay, simplifying process and design

Inactive Publication Date: 2005-10-19
厦门市清科华核供应链有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many technical problems brought about by this solution. In addition to heat dissipation, it will also lead to: (1) decrease in luminous efficacy. At present, the luminous efficacy of a single low-power LED can reach more than 40lm / W, and the area of ​​the tube core is increased to expand the I F Finally, the luminous efficacy drops to 25lm / W or even lower than 15lm / W! And the decrease of luminous efficiency will inevitably increase the heat generation, which makes the heat dissipation problem more prominent; (2) the area of ​​the die increases, and it is more difficult to balance the current density, which will easily cause the local current of the die to be too large and overheated, which will lead to premature decline, which will greatly reduce the overall life of the LED.
2. The drive circuit is expensive and inconvenient to use
But in fact, with the rapid reduction of LED manufacturing costs, the high cost brought by the use of switching circuits is becoming the biggest obstacle to the popularization and promotion of LEDs in the field of lighting.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1. A single-filament AC LED lighting lamp, combined with figure 1 , including AC input terminals a1, a2 and AC LED filaments connected between the AC input terminals, the AC LED filaments include two parallel rows of light-emitting diode columns with opposite conduction directions, and each column of light-emitting diode columns is composed of several light-emitting diode columns Diodes are connected in series. The AC input terminals a1 and a2 are directly connected to the AC power supply AC.

[0025] The specific number N of series-connected LEDs in each LED column can be determined according to the required operating voltage ACV in the following manner,

[0026] N=Int(DCV / Vf)

[0027] Among them, Int means rounding the result, Vf is the nominal voltage value of the light-emitting diode, which is generally 1.8-2.2V for yellow and red light-emitting diodes, and 3.0-3.4V for green and white light-emitting diodes.

[0028] DCV = ...

Embodiment 2

[0031] Embodiment 2. An integrated single-filament AC LED lighting lamp, combined with image 3 and Figure 4 , including the AC input terminals a1, a2 and the AC LED filament connected between the AC input terminals. The AC LED filament in this example adopts a three-level integrated AC LED filament. The structure diagram is shown in Figure 4 , including two columns of series-connected integrated dies with opposite conduction directions, each column of series-connected integrated dies consists of three light-emitting diode dies 2, 3, 4 components, each single die becomes the first level of the series integrated die, a is the positive pole of the single die, b is the negative pole, and c is the luminous body part. The positive pole of the die 4 and the negative pole of the die 2 are electrically connected to the positive pole A and the negative pole B of the substrate, respectively.

[0032] According to the structure in this embodiment, each column of series-connected inte...

Embodiment 3

[0037] Embodiment 3, a multi-terminal control multi-filament AC LED lighting lamp, combined with Figure 8 , including AC input terminals a1, a2 and three AC LED filaments composed of red R, green G, and blue B LEDs respectively, and the three filaments are respectively connected to the AC input terminals through thyristor control switches. The structure of each single die is the same as that in the first embodiment.

[0038] In actual use, the color and brightness of the entire LED lighting can be adjusted by controlling the thyristor control terminals Rc, Gc, and Bc of the three filaments R, G, and B.

[0039] In addition to using red, green, and blue as the combination of filament colors, yellow and blue combinations can also be used. Of course, the same single-color filament can also be used. In this case, the control switch controls the overall brightness of the lamp. In addition, in addition to using thyristors as filament control switches, in some large-scale LED array...

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Abstract

The AC LED lighting lamp includes AC input ends and AC LED filament, and the AC LED filament includes at least two parallelly connected LED arrays in opposite conducting directions and may be in integrated structure. The present invention has the advantages of simple structure without rectifier, voltage stabilizer, filter and switching power source, and high lighting efficiency.

Description

【Technical field】 [0001] The invention relates to a lighting appliance, in particular to an AC LED lighting lamp. 【Background technique】 [0002] Since Edison invented the electric light in 1879, this great creation has brought mankind into a new century full of light and infinite possibilities. The emergence of artificial light sources has been recognized by the international scientific and technological circles as a milestone in the beginning of modern civilized society. From the earliest carbon filament lamps with a lifespan of only 8 hours, to incandescent tungsten filament lamps, fluorescent lamps excited by high-voltage fluorescence, high-pressure sodium lamps that emit light using atomic spectral line transitions, mercury lamps, spiral energy-saving lamps, etc., lighting fixtures based on various light-emitting principles can be described as The variety is complete and the patterns are various. However, the long life, high light intensity and low energy consumption o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S4/00F21Y113/10F21Y115/10H05B37/02
Inventor 吕大明
Owner 厦门市清科华核供应链有限公司
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