CN2570986Y - Light-emitting diode capable of transmitting parallel light - Google Patents

Abstract

The utility model relates to a semiconductor light-emitting diode (LED), particularly a light-emitting diode capable of transmitting parallel light. The utility model comprises an encapsulation body and an LED light-emitting core, wherein, the encapsulation body has the shape of a bowl composed of parabolas; the LED light-emitting core is positioned on a focus of the parabolas. The center portion of the front end surface of the encapsulation body (1) is the shape of partial spherical surface (4); the LED light-emitting core uses a high-brightness LED light-emitting core that is GaN (gallium nitride) and AlGaInP (aluminum gallium indium phosphorus). The utility model has the advantage that the light-emitting diode is capable of transmitting parallel light, or the light-emitting diode has very large ratio of containing parallel light, and large light intensity. Because the parallel light can be transmitted for a long distance, consequently, the utility model can be used for lighting devices required to be transmitted for a long distance of mine lamp, flashlights, railway traffic signal lamps, airplane indicator lamps, stage lamps and building lighting lamps. The application of the high-brightness LED is wider.

Description

A kind of light-emitting diode that can emitting parallel light

Technical field

The utility model relates to semiconductor light-emitting-diode (LED), particularly a kind of can emitting parallel light or be similar to the light-emitting diode of directional light.

Background technology

Along with developing rapidly of high-brightness LED, the LED sales volume that was used for lighting field in 2000 has been turned over one and has been turned over and reach 2,000 4 hundred ten thousand dollars than 1999, account for 2% of high-brightness LED sales volume.Along with the invention of new material and the raising of light efficiency, single led power and luminous flux are also increasing sharply, the LED drive current 20mA that present stage generally uses, and the laboratory has reached the single tube of 300mA to order of amps.The price of LED is also in continuous decline, it is predicted that the cost that LED in 2002 is used to throw light on is 100 a dollars/kilolumen, is 50 dollars/kilolumen in the time of 2005, is 16 dollars/kilolumen in the time of 2010, and its cost will be lower than incandescent lamp in the time of 2005.

Conventional semiconductor light-emitting diode (LED) is rack-mount by the luminous tube tube core, and shell is by the moulding of epoxy resin plastic packaging, and different by the position of tube core and epoxy resin have determined its luminous characteristics.Show as Fig. 2, general light-emitting diode is made up of dome-type unit head and cylinder, luminous core is in the top of bulb focus (3) and promptly locates at luminous point (4), its determining positions lighting angle and luminous flux, luminous core is far away more apart from focus, lighting angle is big more, luminous flux is big more, the ambient light flux reduces, but along with the increase of LED distance, light intensity reduces (sphere light) rapidly, because of luminous core not in the focus of LED, the ratio that causes can not emitting parallel light containing in other words directional light is considerably less, because directional light can long-distance transmissions, if existing LED is directly applied to such as mine lamp, flashlight, the railway traffic signal lamp, these are starved of the lighting device of long-distance transmissions the aircraft indicator light, and major defect is obviously arranged, even the speculum of no-float also is difficult to the effect that obtains.

Summary of the invention

The utility model purpose is according to above-mentioned the deficiencies in the prior art, propose a kind of can emitting parallel light or be similar to the light-emitting diode of directional light.

The utility model purpose realizes being realized by following technical scheme:

The utility model comprises packaging body and the luminous core of LED, it is characterized in that: the luminous core of LED is that its luminous point position is positioned on the focus of front end bulb; The luminous core of LED adopts the luminous core of high-brightness LED, and luminous core is meant: GaN (gallium nitride), AlGaInP (aluminium is transferred indium phosphorus).

The utility model has the advantages that the ratio that can emitting parallel light contains directional light in other words is very big, because of directional light can long-distance transmissions, therefore the utility model can directly apply to that these are starved of the lighting device of long-distance transmissions such as mine lamp, flashlight, railway traffic signal lamp, aircraft indicator light, particularly cooperate rational speculum can obtain satisfied effect fully, it is more extensive that high-brightness LED is used.

Description of drawings

Accompanying drawing 1 is a schematic diagram for the utility model structure;

Accompanying drawing 2 is a schematic diagram for common semiconductor LED structure;

Specific embodiments

Below in conjunction with accompanying drawing and the utility model feature and other correlated characteristic being described in further detail, so that technical staff of the same trade institute is understood easily by embodiment.

Embodiment 1

1,2 show as shown in the figure, and wherein label 1-4 represents packaging body (1), the luminous core of LED (2), focus (3), luminous point (4) respectively.

Show that as accompanying drawing 1 the utility model comprises packaging body (1), the luminous core of LED (2).Adopt shallow slotting formula encapsulation, be its luminous point position be positioned at the front end bulb focus (3) on, the determining of this focus calculates by geometric optics according to the radius of front end bulb and the refractive index of packaging body, the computational methods that adopted are known by technical staff of the same trade, the luminous core of LED adopts the luminous core of high-brightness LED, preferably GaN (gallium nitride), AlGaInP (aluminium is transferred indium phosphorus) etc. can obtain the LED of all colours from infrared to ultraviolet, according to different needs, select different luminous cores.

In addition, the directional light described in the utility model specification is also nisi parallel, but is similar to directional light, and this understands easily for technical staff of the same trade, and in other words, employing the utility model constructed products reaches and is similar to directional light and promptly realized the object of the invention.

Though below design and embodiment according to the utility model purpose have been done to elaborate with reference to accompanying drawing; but those of ordinary skills can recognize; under the precondition that does not break away from the claim limited range; still can make various improvement and conversion to the utility model; such as; the variation of packaging body shape cause the focal position to determine that required computational methods change thereupon, and this improvement and conversion still should belong to protection range of the present utility model.

Claims (2)

1, a kind of light-emitting diode that can emitting parallel light comprises the luminous core of packaging body and LED, it is characterized in that the luminous core of LED is positioned on the focus of front end bulb.

2, a kind of light-emitting diode that can emitting parallel light according to claim 1 is characterized in that, the luminous core of LED adopts the luminous core of high-brightness LED to be meant GaN (gallium nitride), AlGaInP (aluminium is transferred indium phosphorus).

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