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AC Light Emitting Diode Device

A technology of light-emitting diodes and AC voltage sources, applied in lighting devices, lighting device parts, light sources, etc., can solve problems such as increasing manufacturing costs, reducing overall service life, and affecting the appearance of lighting tools

Active Publication Date: 2015-11-25
EPISTAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these additional transformers or rectifiers will increase the overall manufacturing cost, occupy space and affect the appearance of lighting tools, generate heat and reduce the safety of LEDs for long-term use
Moreover, the service life of the external circuit itself is shorter than that of the LED, thus reducing the overall service life of the LED in the application

Method used

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  • AC Light Emitting Diode Device
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  • AC Light Emitting Diode Device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0029] Please refer to figure 1 , which is a schematic diagram of a first example of an AC light emitting diode device according to the first embodiment of the present invention. The AC light emitting diode (LED) device 100 includes a control unit 110 and a plurality of LEDs 121-12n. At least some of the LEDs 121-12n have different microcrystalline areas. The control unit 110 is used to control the LEDs 121-12n respectively. Wherein, when the LEDs 121 - 12n are driven by an AC voltage source, the control unit 110 sequentially turns on the LEDs with different microcrystalline grain areas according to the voltage of the AC voltage source. At figure 1 In the description, the microcrystalline area of ​​each LED is not the same as an example for illustration, but it is not limited thereto. A plurality of LEDs 121 - 12n are connected in series, and the anode and cathode of each LED are electrically connected to the control unit 110 . Wherein, the control unit 110 and the LEDs 1...

no. 2 example

[0040] Please refer to Figure 7 , which is a schematic diagram of a first example of an AC light emitting diode device according to a second embodiment of the present invention. The AC LED device 300 includes a control unit 310 and a plurality of LEDs 321-32n. The anode and cathode of each LED 321 - 32n are electrically connected to the control unit 310 . Wherein, the control unit 310 and the LEDs 321 - 32n can be integrated in a chip or a package, or the control unit 310 is outside the package, which is not limited.

[0041] At Figure 9 Among them, the node A and the node B are electrically connected to an AC voltage source (not shown in the figure). When the LEDs 321-32n are driven by the AC voltage source, the control unit 310 changes the state of the LEDs 321-32n in series or parallel according to the voltage of the AC voltage source, so that the current flowing through the LEDs 321-32n tends to be uniform.

[0042] Please refer to Figure 8A and Figure 8B , Fig...

no. 3 example

[0046] The technical features of the above-mentioned first embodiment and the second embodiment of the present invention can be implemented separately or in combination. Please refer to Figure 9 , which is a schematic diagram of an AC LED device according to a third embodiment of the present invention. The AC LED device 400 includes a control unit 410 and a plurality of LEDs 421-42n. The anode and cathode of each LED are electrically connected to the control unit 410 , and at least some of the LEDs 421 - 42n have different crystal grain areas. Wherein, the control unit 410 and the LEDs 421 - 42n can be integrated in a chip or a package, or the control unit 410 is outside the package, which is not limited.

[0047] At Figure 9 Among them, the node A and the node B are electrically connected to an AC voltage source (not shown in the figure). When the LEDs 421~42n are driven by the AC voltage source, the control unit 410 changes the state of the LEDs 421~42n in series or pa...

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PUM

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Abstract

The invention discloses an AC light-emitting diode (LED) device, comprising a control unit and a plurality of light-emitting diodes (LED). The anode and the cathode of the light-emitting diode (LED) are respectively connected to the control unit, wherein, the light-emitting diodes (LED) are driven by an AC voltage source; the control unit changes the state of connection in series or the state of connection in parallel for the light-emitting diodes (LED) according to the voltage of the AC voltage source, which leads the size of the current flowing through the LEDs to become uniform.

Description

technical field [0001] The present invention relates to an AC light-emitting diode device, and in particular to an AC light-emitting diode device that can directly use a commercial AC voltage source and has high luminous efficiency. Background technique [0002] Light Emitting Diode (LED) has become an extremely ideal new generation lighting source due to its high durability, long life, light weight and low power consumption, and does not contain harmful substances such as mercury. In recent years, due to the invention of the blue LED to solve the problem of electrostatic protection, coupled with the improvement of LED brightness, the application field of LED has continued to expand, and has become an indispensable and important lighting tool in modern life, such as from indicator lights, monitors, indoor From exterior lighting to vehicle lighting, LEDs are used for lighting purposes, and the cost of LEDs has also been greatly reduced. [0003] Since the current municipal p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S2/00F21V23/00H05B37/02F21Y101/02
Inventor 戴晟杰叶文勇詹益仁
Owner EPISTAR CORP