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Led bulb

A technology of LED light bulbs and LED chips, which is applied in the use of lampshades, gas discharge lamps, lighting and heating equipment, etc., can solve problems such as uniform brightness of difficult light bulbs and difficult light bulbs

Active Publication Date: 2013-03-06
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 addition, since the light emitted from the blue LED is used to generate white light in the existing LED light bulb, it is difficult to make the brightness of the entire bulb uniform
Accordingly, it is considered that there are difficulties in reducing the flickering of the bulb and the local glare phenomenon, the so-called glare

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~10

[0080] First, Eu-activated alkaline earth chlorophosphate ((Sr 0.604 Ba 0.394 Eu 0.002 ) 5 (PO 4 ) 3 Cl) Phosphor, Eu and Mn-activated alkaline earth silicate ((Sr 0.225 Ba 0.65 Mg 0.0235 Eu 0.1 mn 0.0015 ) 2 SiO 4 ) phosphor, prepare Eu and Mn activated alkaline earth silicate ((Sr 0.675 Ba 0.25 Mg 0.0235 Eu 0.05 mn 0.0015 ) 2 SiO 4 ) phosphor (1) and Eu and Mn activated alumina silicate ((Ba 0.9 Mg 0.5 Eu 0.2 mn 0.4 ) Al 10 o 17 ) phosphor (2), Eu-activated lanthanum oxysulfide ((La 0.9 Eu 0.1 ) 2 o 2 S) Phosphor (1) and Eu-activated sialon ((Sr 0.9 Eu 0.1 ) 2 Si 7 Al 3 ON 13 ) Phosphor (2), Mn-activated magnesium fluorogermanate (3.5MgO·0.5MgF 2 ·(Ge 0.75 mn 0.25 )O 2 ) Phosphor.

[0081] The respective phosphors described above were mixed at the ratios shown in Table 1, and LED light bulbs were respectively produced as follows using these mixed phosphors. First, a phosphor is dispersed in a silicone resin as a binder resin, and defoami...

Embodiment 11

[0096] An LED light bulb was produced in the same manner as in Example 8, except that a silicone resin film with a film thickness of 160 μm not containing phosphor particles was formed on the fluorescent film of Example 8 (film thickness=645 μm). When the characteristics of this LED light bulb were measured, the luminance was 40 lm / W, the color temperature was 2800K, the color rendering index Ra was 90, and the leakage amount of ultraviolet rays was 0.02 mW / nm / lm.

Embodiment 12

[0098] An LED light bulb was produced in the same manner as in Comparative Example 1 except that an epoxy resin film with a film thickness of 50 μm was formed as a resin film not containing phosphor particles on the fluorescent film (film thickness = 55 μm) of Comparative Example 1. . Here, the epoxy resin film was formed using the aforementioned epoxy resin NLD-SL-2101 (trade name) manufactured by SANYU LEC Corporation. When the characteristics of this LED light bulb were measured, its luminance was 22lm / W, its color temperature was 2705K, its color rendering index Ra was 89, and its ultraviolet light leakage was 0.1mW / nm / lm.

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Abstract

The disclosed LED bulb (1) is equipped with an LED module (2), a base section (3) whereon the LED module (2) is arranged, and a globe (4) which is mounted on the base section (3). The LED module (2) is provided with LED chips (8) which are mounted on a substrate (7) and which emit ultra violet to violet light. The base section (3) is provided with a lighting circuit and a connector (6). A fluorescent film (9) is provided on the inner surface of the globe (4) and absorbs the ultra violet to violet light emitted from the LED chips, and emits white light. The fluorescent film (9) has a film thickness in the range of 80-800[mu]m. The amount of UV rays which leaks out from the globe (4) in the LED bulb (1) is not greater than 0.1mW / nm / 1m.

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, signal devices, various switches, vehicle lamps, and general lighting. In particular, a white-light type LED lamp, which is a combination of an LED and a phosphor, has attracted attention as a substitute for an incandescent light bulb, and research and development on this is rapidly progressing. As a light bulb using an LED lamp (hereinafter referred to as an LED light bulb), for example, a light bulb with an integral structure is known. The light bulb has a spherical cover attached to a base part provided with a bulb socket, and an LED is arranged in the spherical cover. The chip is further provided with a lighting circuit of the LED chip in the base part. [0003] In existing LED light bulbs, LED chips (blue L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V3/04H01L33/50F21Y101/02
CPCF21V3/04F21K9/56H01L33/50F21V9/16F21K9/135F21Y2101/02Y02B20/181F21S2/00F21V3/0409F21K9/232F21K9/64F21Y2115/10C09K11/663C09K11/7734C09K11/7739C09K11/7789F21V3/06F21V9/38F21V9/06Y02B20/00C09K11/77342C09K11/77348
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