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Light emitting device

A technology of light-emitting devices and light-emitting diodes, which is applied in the direction of electrical components, electric solid-state devices, circuits, etc., and can solve the problems of transformers and converters, energy waste, and user weight.

Active Publication Date: 2012-06-13
EPISTAR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, transformers and converters usually occupy a large volume and are too heavy for users to carry them around
Furthermore, when AC is converted to DC, it always comes with the problem of wasting energy

Method used

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Embodiment Construction

[0046] In the description of the present application, the AC / DC lighting device uses a bridge rectifier circuit as its basic circuit configuration, and also incorporates flip-chip technology or the concept of thin-film LEDs. Micro LEDs or Schottky diodes are electrically connected to each other to form a bridge rectifier circuit. During the manufacturing process of the AC / DC light-emitting device, the micro-LEDs of the light-emitting device can be bonded to the heat-dissipating substrate through an adhesive layer instead of being disposed on the original substrate, so as to improve heat-dissipating capability and luminous efficiency. The heat sink substrate can be a replacement substrate or a sub-mount. Conductive wires can be formed on the surface of micro-LEDs, replacement substrates or sub-mounts. Furthermore, the miniature light-emitting diodes or Schottky diodes in each circuit branch of the bridge rectifier circuit can be electrically connected in series, in parallel or...

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PUM

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Abstract

A light emitting device includes a plurality of micro diodes, which are electrically connected to constitute a bridge rectifier circuit. Each branch of the bridge rectifier circuit includes a single micro diode or a plurality of micro diodes. The light emitting device is electrically connected to an AC power source, which alternately drives the light emitting device in two current loops. Therefore, the micro diodes in two current loops of the bridge rectifier circuit emit light by turns.

Description

technical field [0001] The present invention relates to a lighting device, and in particular to a lighting device with a bridge rectifier circuit. Background technique [0002] Due to the advancement of manufacturing technology, light emitting diodes (Light emitting diodes, LEDs) have been widely used in solid state lighting products. According to the physical characteristics of LEDs, most suggest to provide low voltage and DC power to LEDs. Therefore, whenever only high-voltage AC power can be obtained, the LED must be provided with a step-down transformer and an AC-to-DC converter (AC-to-DC converter). However, transformers and converters usually occupy a large volume and are too heavy for users to carry them around. Furthermore, when alternating current is converted into direct current, it always comes with the problem of energy waste. Therefore, it is very important for manufacturers to provide LED-related products with higher efficiency. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L25/16
CPCH01L2924/19105H01L23/60H01L33/62H01L27/156H01L2224/24H01L2924/12032H01L25/167H01L2924/00
Inventor 叶文勇颜玺轩陈泽澎
Owner EPISTAR CORP
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