LED light bulb

A technology of LED light bulbs and LED chips, which is applied to lampshades, circuits, electric light sources, etc., can solve the problems of uneven brightness of light bulbs, difficult light distribution angle, and difficulty in reducing the glare of light bulbs.

Active Publication Date: 2015-07-22
首尔半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In conventional LED light bulbs, light emitted from blue LEDs is used to generate white light, so the overall brightness of the light bulb is uneven
Therefore, it is difficult to reduce the glare and local glare of the light bulb, that is, glare (glare).
The straightness of the blue light emitted from the blue LED is strong, and the light that advances in the horizontal direction is straight without expanding to the surroundings, that is, it is difficult to sufficiently increase the light distribution angle

Method used

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Examples

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Embodiment 1～9

[0080] First, as a blue (B) phosphor, an activated alkaline earth chlorophosphate ((Sr 0.604 Ba 0.394 Eu 0.002 ) 5 (PO 4 ) 3 Cl) Phosphor; As a blue-green (BG) phosphor, prepare an active alkaline earth silicate ((Sr 0.225 Ba 0.65 Mg 0.0235 Eu 0.1 mn 0.0015 ) 2 SiO 4 ) phosphor; as a green to yellow (GY) phosphor, an active alkaline earth aluminosilicate ((Ba 0.9 Mg 0.5 Eu 0.2 mn 0.4 ) Al 10 o 17 ) Phosphor (GY1), active alkaline earth silicate with Eu and Mn ((Sr 0.675 Ba 0.25 Mg 0.0235 Eu 0.05 mn 0.0015 ) 2 SiO 4 ) Phosphor (GY2), active rare earth aluminate with Ce with an average particle size of 10 μm (Y 3 MgAl 3 SiO 12 : Ce 3+ ) Phosphor (GY3), active sialon polymer material ((Si, Al) with europium with an average particle size of 15 μm 6 (O,N) 8 :Eu 2+ ) Phosphor (GY4), active sialon polymer material with europium ((Sr 0.8 Eu 0.2 ) 3 Si 13 al 3 o 3N 22 ) phosphor (GY5).

[0081] As a red (R) phosphor, Eu-containing active oxygen lant...

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Abstract

An LED light bulb 1 according to the embodiment includes an LED module 2, a base part 3 on which the LED module 2 is disposed, and a globe 4 attached to the base part 3. The LED module 2 includes an ultraviolet to violet light-emitting LED chip 8 mounted on a substrate 7. A lighting circuit and a bayonet cap 6 are provided at the base part 3. A phosphor screen 9 absorbing the ultraviolet to violet light emitted from the LED chips and emitting white light is provided at an inner surface of the globe 4. The phosphor screen 9 has a color in which a* is -10 or more and +10 or less, b* is 0 (zero) or more and +30 or less, and L* is +40 or more when a body color thereof is represented by an L*a*b* color system.

Description

technical field [0001] Embodiments of the present invention relate to LED light bulbs. Background technique [0002] Light emitting devices using light emitting diodes (LEDs) are widely used in lighting devices such as backlights for liquid crystal display devices, signaling devices, various backlights, vehicle lamps, and general lighting. White-emitting LED lamps that combine LEDs and phosphors are attracting attention as a substitute for incandescent bulbs, and their development is rapidly progressing. As a light bulb using an LED (hereinafter also referred to as an LED light bulb), for example, a lampshade is installed on a base portion provided with a light bulb base, and an LED chip is arranged in the lampshade, and a lighting circuit of the LED chip is provided in the base portion. The light bulb of the light structure of the body shape. [0003] In the existing LED light bulbs, a combination of an LED chip (blue LED) that emits blue light and a yellow phosphor (YAG ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S2/00F21V3/00F21V3/04H01L33/50F21Y101/02
CPCF21K9/135F21Y2101/02F21K9/56H01L33/507H05B33/12F21K9/232F21K9/64F21Y2115/10C09K11/0883C09K11/664C09K11/7734C09K11/7739C09K11/7783C09K11/7789C09K11/77744C09K11/77342C09K11/77348
Inventor 大屋恭正山川昌彦白川康博中川胜利
Owner 首尔半导体有限公司
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