The present invention relates to a light emitting diode (LED), more particularly, to a structural improvement of an LED for an automotive lamp.
Traditionally, lamps for automobiles use bulbs as light sources, and have a painted cover added additionally according to different uses of the automotive lamps. However, such application wastes energy, and due to the short working life of the bulbs, if the bulbs are damaged suddenly during running, human life will be threatened. In order to eliminate such situation, alternative light sources for replacing the bulbs are available on the market.
Currently, the most commonly used alternative light sources are light emitting diodes (LEDs). LED is a light emitting component of semiconductor process and has the advantages of good vibration resistance, being power saving, long working life, without idling time, rapid response speed, having diverse and pure colors, and thus the disadvantages of conventional bulbs, such as power wasting and short working life, can be effectively alleviated. Further, if the LED has a circuit design control, it can exert the functions after being damaged, thus avoiding the traffic accidents due to disabled light source.
Further, Economic Commission for Europe (ECE) and Society of Automotive Engineers (SAE) have defined test regulations on the luminous intensity and light form of automotive lamps. The light forms of the regulation assume a symmetrical cross-axis light form distribution. In order to meet the requirements of the regulation, various improvements for automotive lamps have been developed on the market, such as ROC Patent No. 258550, titled miniaturized LED lighting module for LED head light module, in which a light guide component is disposed on a light exit surface of an LED, the light beam of the LED is gathered and then emitted from a light emitting side. The light emitting side of the light guide component has a shield for regulating the light form according to the automotive lamp regulations, such that the light beam emitted from the light emitting side is partially shielded, thus achieving the purpose of modifying the light form of the emitted light beam to meet the light form regulated by the automotive lamp regulations. However, although the patent can meet the requirements of the regulations, for baffling a part of the light source, a shield is required to be additionally disposed and the light energy is wasted, and thus the cost and the power consumption are increased.
Accordingly, the present invention is directed to an LED for an automotive lamp, such that when the LED emits light, the light has a light form meeting the requirements for light form distribution regulated by ECE and SAE regulations.
The LED includes a support having a reflection accommodation area, a chip planted in the reflection accommodation area, and a molding compound covering the chip. The LED has a cross-axis symmetrical optical structure on a light emitting path, such that a light form of the light assumes a symmetrical cross-axis distribution due to the optical structure.
When the optical structure is a molding compound, the molding compound has a cross-axis symmetrical structure, and two ends of an axis are in the same shape, such as an arc shape, a triangular shape, or a square shape, such that when the light passes through the optical structure of the molding compound, the light form of the light assumes a cross-axis distribution.
Further, the optical structure of the present invention can also be the reflection accommodation area. When the optical structure is the reflection accommodation area, the reflection accommodation area has a cross-axis symmetrical structure, and two ends of an axis are in the same shape, such as an arc shape, a triangular shape, or a square shape, such that when the light passes through the optical structure of the reflection accommodation area, the light form of the light assumes a cross-axis distribution.
The structural improvement can achieve the purpose of the present invention. In order to make those skilled in the art understand the objects, features, and efficacy of the present invention, the present invention is illustrated in detail by the following embodiments with reference to the drawings.
The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and wherein:
a is a luminous intensity distribution meeting the requirements of ECE regulations;
b is a light form distribution view of the luminous intensity of
c is a luminous intensity distribution meeting the requirements of SAE regulations;
d is a light form distribution view of the luminous intensity of
a is a top view of an optical structure according to the first embodiment of the present invention;
b is a top view of an optical structure according to a forth embodiment of the present invention;
c is a top view of an optical structure according to a fifth embodiment of the present invention;
d is a top view of an optical structure according to a sixth embodiment of the present invention;
The foregoing aspects, as well as many of the attendant advantages and features of this invention will become more apparent by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
Next, referring to
Accordingly, the present invention provides an LED. The light form of the light emitted from the LED meets the requirements for the light form distribution regulated by ECE and SAE. The LED has a cross-axis symmetrical optical structure disposed on a light emitting path. Two ends of an axis of the optical structure are in the same shape, such that the light form distribution of the light can be in a symmetrical cross-axis distribution due to the optical structure.
Further, according to the present invention, the same light form distribution can be obtained by an LED 4 shown in
In the LED, the optical structure is a cross-axis symmetrical structure, and two ends of an axis must be in the same shape, such as an arc shape, a triangular shape, or a square shape, and the shape of the optical structure can make reference to
Further, the present invention is not merely as shown in
While the present invention has been described in connection with a preferred embodiment thereof, it will be apparent to those skilled in the art that many changes and modifications may be made without departing from the true spirit and scope of the present invention. Accordingly, it is intended by the appended claims to cover all such changes and modifications as come within the spirit and scope of the invention.
Number | Date | Country | Kind |
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096202973 | Feb 2007 | TW | national |