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Color temperature-adjustable high-color development LED lamp and manufacturing method thereof

A technology for an LED lamp and a manufacturing method, which is applied to parts of lighting devices, semiconductor devices of light-emitting elements, optical elements used to change the spectral characteristics of emitted light, etc. Brightness and other issues, to achieve high brightness, reduce consumption, improve brightness and color rendering index

Inactive Publication Date: 2012-05-30
SKYWORTH LCD SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although this method can obtain LED lamps with high color rendering, multiple red light chips are used, and the light energy absorbed by multiple red light chips will reduce the brightness of the LED lamp. At the same time, the driving circuit is complicated and the cost is high.

Method used

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  • Color temperature-adjustable high-color development LED lamp and manufacturing method thereof
  • Color temperature-adjustable high-color development LED lamp and manufacturing method thereof
  • Color temperature-adjustable high-color development LED lamp and manufacturing method thereof

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Embodiment Construction

[0022] Please refer to figure 1 and figure 2 , which are respectively a schematic cross-sectional view and a schematic structural view of an embodiment of the LED lamp provided by the present invention; as shown in the figure, this embodiment mainly includes:

[0023] There is a cavity 10 in the encapsulation material 17 and two blue light chips 11 and at least one yellow light chip 12 placed at the bottom of the cavity 10. Red phosphor 13, green phosphor 14 and glue 15 form a phosphor, which is filled in Inside the chamber 10.

[0024] The bottom of the chamber 10 is provided with a metal lead frame 16 for fixing the LED chip; and the lead frame 16 is provided with at least two blue light chips 11 and one yellow light chip 12, and the yellow light chip 12 is fixed in the middle of the blue light chip 11 . The bottom layer of the yellow light chip 12 is a transparent substrate.

[0025] The glue 15 is silica gel or silicone resin or epoxy resin; and the encapsulation mat...

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Abstract

The invention discloses an LED lamp with high color rendering and adjustable color temperature, and comprises a cavity as well as an LED chip and a fluophor which are arranged in the cavity; wherein the LED chip comprises at least two blue light chips and at least one yellow light chip which are all arranged at the bottom part of the cavity; and the fluophor is composed by red fluorescent powder, green fluorescent powder and glue, and is filled in the cavity. The invention also discloses a manufacturing method of the LED lamp with high color rendering and adjustable color temperature, comprising the steps as follows: at least two blue light chips and at least one yellow light chip are positioned at the bottom part of the cavity; and the red fluorescent powder and green fluorescent powder are mixed by the glue to form a fluophor to be filled in the cavity. The invention matches the blue light chips with the yellow light chip, rationally arranges the number and position of the two chips, changes the driving electric current and adjusts the dosage ratio of the red fluorescent powder and green fluorescent powder so that a white light LED lamp with high color rendering index and adjustable color temperature can be manufactured.

Description

technical field [0001] The invention relates to the field of white light LED lighting, in particular to a high color rendering LED lamp with adjustable color temperature and a manufacturing method thereof. Background technique [0002] In the prior art, there are generally the following three schemes for LED lights that emit white light: [0003] 1. Use blue LED chips, red LED chips, and green LED chips to form independent circuits. By adjusting the current of each circuit, although the purpose of adjusting the color rendering index and brightness can be achieved, the driving circuit is complicated and the cost is high. [0004] 2. Using three-wavelength white LED lamps, using blue LED chips with a wavelength of 430nm to 480nm to excite phosphors mixed with red phosphors and green phosphors to generate red and green light, which are then mixed with the original blue light to generate white light. Due to the low excitation efficiency of red light, the brightness of the LED l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S2/00F21V19/00F21V9/10H01L33/00F21Y101/02F21K9/20F21K9/64F21K9/90F21V9/16F21V9/40F21Y115/10
Inventor 孙平如周亮徐欣荣
Owner SKYWORTH LCD SHENZHEN CO LTD
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