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 large size, difficult light distribution angle, uneven brightness of light bulbs, etc.

Active Publication Date: 2015-11-25
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 tends to be 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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] First, as a blue phosphor, an activated alkaline earth chlorophosphate ((Sr 0.604 Ba 0.394 Eu 0.002 ) 5 (PO 4 ) 3 Cl) Phosphor; As a green to yellow phosphor, prepare an active alkaline earth silicate ((Sr 0.675 Ba 0.25 Mg 0.0235 Eu 0.05 mn 0.0015 ) 2 SiO 4 ) phosphor; as a red phosphor, an active oxygen lanthanum sulfide ((La 0.9 Eu 0.1 ) 2 o 2 S) Phosphor. These phosphors were mixed so that the mass ratio of the blue phosphor, green to yellow phosphor, and red phosphor was 17.6:4.1:78.3 to prepare a mixed phosphor (BGR phosphor).

[0077] Next, prepare to have figure 1 Shade in the shape shown. The lampshade is made of translucent polycarbonate resin with a visible light transmittance of 88%, and has a dome shape with a thickness of about 1 mm, a diameter D2 of the largest part of 63 mm, and a diameter D1 of the mounting part attached to the base part of 59 mm. A fluorescent film was formed on the inner surface of this lampshade in the following mann...

Embodiment 2～22

[0080] prepare multiple figure 2 Shade in the shape shown. The specific shapes of these shades are the shapes shown in Table 1, namely, the diameter D2 of the largest part, the diameter D1 of the mounting portion attached to the base, and the height H of the constricted portion. An LED light bulb was produced in the same manner as in Example 1 except that such a shade was used. These LED light bulbs were used for the characteristic evaluation mentioned later.

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Abstract

An LED light bulb (1) of the present invention comprises an LED module (2), a base body section (3) wherein the LED module (2) is arranged, and a globe (4) attached to the base body section (3). The LED module (2) comprises UV- or purple light-emitting LED chips (8) mounted to a surface (7a) of a substrate (7). The globe (4) has a circular cross-section parallel to the surface of the substrate (7). A fluorescent film (9) that absorbs the UV or purple light emitted from the LED chips and emits white light is disposed on the inside surface of the globe (4). The globe (4) cross section has a shape wherein the diameter (D1) of the section for attachment to the base body section (3) is smaller than the diameter (D2) of the largest section thereof.

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): F21S2/00F21V3/02F21V3/04H01L33/50F21Y101/02
CPCF21V9/16F21K9/135F21K9/56F21V3/00F21V3/02F21V3/0481F21Y2101/02F21K9/232F21K9/64F21Y2115/10F21V3/12F21V9/30
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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