[2] Background Art [3] Generally, a LED is an electronic element which produces carriers (electrons) using a p-n bonding structure of a semiconductor and emits light by a rejoining of these carriers.

[4] This LED has a small size and a long life span compared with a conventional light source, and further has a low power consumption and a high efficiency as it convents electric energy into light energy.

[5] In addition, the LED has a feature of a rapid responsibility so that it is widely applied to an indication lamp or a number indicating device of various electronic apparatus such as a display element of a car instrument and a light source for a telecommunication, and to a guide lamp for a home, a vessel, a traffic signal, or a evacuation as lighting means.

[6] However, a conventional LED lamp used as the lighting means has a simple structure, and auxiliary means such as a reflector for reflecting light from the LED always has the same dome shape instead of having a multi angular structure.

Therefore, technical and structural developments are required for an improvement of a light emitting efficiency.

[7] Disclosure of Invention Technical Problem [8] Different from a usage of the conventional LED lamp, especially lamps applied to the car mostly comprises conventional electric bulbs, and due to a luminance, a delay to reach a maximum light emitting, and a short life span, the electric bulb is limited in being applied to the car. However, since the conventional LED lamp simply has the reflector surrounding the light source similar to the convention electric bulb and thus has limitations in the light emitting range and the expanding range of the luminance, as mentioned above, the LED lamp would not be applied to a breadth indication lamp, a brake lamp, a signal lamp and the like which should keep a small size in order to secure an applicability even though the number of the light source are increased.

[9] That is, in case of maintaining the small size and structure, due to limited number of the LED inserted into the lamp for the car, proper luminance and maximum light emitting could not be obtained and thus the lamp would not be distinctly recognized.

[10] The number of the LED should be increased so as to increase the luminance, but in this case, the small size of the lamp could not be maintained.

[11] When the LED with a high luminance is used, a manufacturing cost is increased and an economical efficiency could not be secured.

[12] Technical Solution [13] The present invention is contemplated to solve aforementioned problems, and has following objects: [14] First, to provide a lighting structure for the car to use a LED which is applied to a signal lamp, a brake lamp, a headlight, a breadth indication lamp and the like, so that a luminance, a delay to a maximum light emitting, and a short life span are overcome and a light emitting efficiency is improved; [15] Second, to provide the lighting structure for the car to use the LED, in which a light emitting range is expanded in all the directions by installing the LED lamps and reflectors at both of upward and downward positions and the light emitting range and the luminance are increased by forming the reflector to have a multi angular structure, so that the lamp and the car could be distinctly recognized; [16] Third, to provide the lighting structure for the car to use the LED, in which the LEDs are disposed at upper, lower and side positions to expanding the light emitting range in all the direction even with maintaining small size and structure in order to be applied to the signal lamp, the brake lamp, the headlight, the breadth indication lamp and the like, so that the light emitting range and the luminance are increased with the limited number of the LED, and thus an economical efficiency is improved and the car is distinctly identified.

Advantageous Effects [17] Based on the lighting structure for the car to use the LED according to the present invention, various modifications of a LED lighting unit are applied to the breadth indication lamp, the brake lamp, the signal lamp and the like, so that the luminance and the light emitting range are increased to allow the car to be easily recognized. As the WO 2005/085703 PCT/KR2005/000597 present invention employs the LED has a longer life span than a conventional electric bulb, the economical efficiency is increased. Further, a traveling direction of the emitted light could be adjusted conforming to the purpose, and thus the light emitting efficiency is improved.

[18] Brief Description of the Drawings [19] The features and advantages of the present invention will be more described specifically in the following description of preferred embodiments of the invention with reference to the accompanying drawings wherein: [20] FIG. 1 is a perspective view showing a lighting structure for the car to use a LED according to the present invention; [21] FIG. 2 is an exploded perspective view showing the lighting structure for the car to use the LED according to the present invention; [22] FIG. 3 is a perspective view showing one embodiment in the lighting structure for the car to use the LED according to the present invention; [23] FIG. 4 is a perspective view showing another embodiment in the lighting structure for the car to use the LED according to the present invention; [24] FIGS. 5-8 are drawings showing still another embodiments in the lighting structure for the car to use the LED according to the present invention; [25] FIG. 9 is a schematic view showing one example of the LED in the present invention; [26] FIGS. 10-15 are drawings showing embodiments of a reflector applied to a LED lighting unit according to the present invention, respectively; [27] FIG. 16 is a schematic view showing the LED lamps which are circumferentially arranged with opening widely in the lighting structure for the car to use the LED according to the present invention; and [28] FIG. 17 is an exploded perspective view showing the LED lamp disposed at a center of a printed circuit board in the lighting structure for the car to use the LED according to the present invention.

[29] Best Mode for Carrying Out the Invention [30] Reference will now be made in detail to an embodiment of the present invention, examples of which are illustrated in the accompanying drawings. Objects, features and advantages of the present invention would be appreciated more distinctly through the embodiment.

[31] FIG. 1 is a perspective view showing a lighting structure for the car to use a LED according to the present invention, FIG. 2 is an exploded perspective view showing the WO 2005/085703 PCT/KR2005/000597 lighting structure for the car to use the LED according to the present invention, FIG. 3 is a perspective view showing one embodiment in the lighting structure for the car to use the LED according to the present invention, FIG. 4 is a perspective view showing another embodiment in the lighting structure for the car to use the LED according to the present invention, FIGS. 5-8 are drawings showing still another embodiments in the lighting structure for the car to use the LED according to the present invention, FIG. 9 is a schematic view showing one example of the LED in the present invention, FIGS. 10-15 are drawings showing embodiments of a reflector applied to a LED lighting unit according to the present invention, respectively, FIG. 16 is a schematic view showing the LED lamps which are circumferentially arranged with opening w idely in the lighting structure for the car to use the LED according to the present invention, and FIG. 17 is an exploded perspective view showing the LED lamp disposed at a center of a printed circuit board in the lighting structure for the car to use the LED according to the present invention.

[32] Firstly, as shown in FIGS. 1 and 2, the lighting structure for the car to use the LED according to the present invention comprises a socket 110 for a mounting the lighting apparatus and supplying power, a LED lighting unit 120 being supplied with the power by the socket 110 and including the LEDs 121 which emit the light and are stacked oppositely in upward and downward directions, and a cover 130 for protecting the LED lighting unit 120.

[33] The socket 110 employs various coupling according to its application such as a thread coupling, a fitting and an insertion.

[34] The LED lighting unit 120 has a plurality of the LEDs 121, upward and downward printed circuit boards 122 and 122 for allowing the LEDs to be disposed and arranged thereon, reflectors 123 and 123 provided in traveling directions of the light emitted from the LEDs 121 and reflecting or refracting the light emitted from the LEDs by various angles so as to arbitrarily adjust the traveling directions of the light.

[35] The LED lighting unit 120 is preferably formed to have an opposite stacking or arranging structure, considering an improvement of a light emitting efficiency by emitting in all the directions, and an embodiment thereto will be explained in detail.

[36] In the LED lighting unit 120, a fixing plate 124 has one surface attached to an upper inner surface of the cover 130 and includes a hollow at a center thereof for allowing the light to be radiated smoothly, and the upward reflector 123 of a polygon is coupled on the other surface of the fixing plate 124 and has a hole for allowing the light to be radiated smoothly. Preferably, outer and inner surfaces adjacent to the hole comprise a transparent body so as to increase a radiation range and a spreading range of the light emitted from the LEDs 121.

[37] The upward printed circuit board 122 on which the LEDs 121 are circumferentially WO 2005/085703 PCT/KR2005/000597 arranged in the upward direction, is provided below the upward reflector 123, and supply the power to the LEDs 121.

[38] Meanwhile, an insulation body 125 is provided below the upward printed circuit board 122 so as to prevent a short circuit and an electric shock.

[39] The downward printed circuit board 122 for supporting and supplying the power to the LEDs 121 circumferentially arranged in the downward direction is provided below the insulation body 125, and the polygonal downward reflector 123 having the hole is provided below the downward printed circuit board 122 in order to allow the light to be radiated smoothly. Once the power is supplied, the LEDs 121 emit the light in the upward and downward directions, so that the emitting range and luminance is improved compared with the conventional lighting apparatus.

[40] Referring to FIG. 3, the insulation body 125 is formed below the upward printed circuit board 122 on which the LEDs 121 are circumferentially arranged in the upward direction, the upward reflector 123 is provided below the insulation body 125, and the upward printed circuit board 122 on which the LEDs 121 are circumferentially arranged in the upward direction is provided below the upward reflector 123.

[41] Referring to FIG. 4, the LEDs 121 are arranged in side directions below the upward printed circuit board 122 on which the LEDs 121 are circumferentially arranged in the upward direction, the downward printed circuit board 122 for supporting and supplying the power to the LEDs 121 circumferentially arranged in the downward direction is provided below the LEDs 121 arranged in the side directions, and the downward reflector 123 is provided below the LEDs 121 arranged in the downward direction.

[42] Referring to FIG. 5, the LEDs are normally arranged in the downward direction on the printed circuit board 122'and the downward reflector 123 is provided below the downward LEDs 121. The lighting unit 120 comprises upper and lower parts by repeating a combination mentioned above.

[43] Referring to FIG. 6, the LEDs 121 are normally arranged in the upward direction on the printed circuit board 122 below the upward reflector 123, and the lighting unit 120 comprises upper and lower parts by repeating a combination mentioned above.

[44] Referring to FIG. 7, the lighting unit 120 could be comprised of an upper part in which the LEDs 121 are normally arranged in the upward direction on the printed circuit board 122 and middle and lower parts in which the LEDs are normally arranged in the downward direction on the printed circuit board 122 and the downward reflector 123 is provided below the downward LEDs 121.

[45] Referring to FIG. 8, the LEDs 121 are normally arranged in the upward and downward directions on the printed circuit boards 122,122 so as to form multistage subunits, the reflectors 123 and 123 are provided so as to allowing easy refraction and reflection corresponding to the upward and downward arrangements of the LEDs, and WO 2005/085703 PCT/KR2005/000597 from a top to a bottom, the combination of the reflector, the LEDs, and the printed circuit board are enlarged so as to form a pyramid-like LED lighting unit.

[46] In addition, it would be apparent that various types of the LED lighting unit could be configured by applying the structures of FIG. 5-8, though not shown in the drawings.

[47] As shown in FIG. 9, the LEDs 121 arranged in the multistage subunits such as the upper, middle, and lower parts, have isolation layers 121a formed on a lower outer surface, a bottom outer surface or both of the lower and bottom outer surfaces of the LEDs 121 in order to improve a luminous intensity by an increase of concentration in light emitting. The isolation layer 121a is comprised of a material of relatively good reflection efficiency, for example attached aluminum foil, coated silver or chrome or isolation paint.

[48] Additionally, the LEDs 121 emit the light of single color, but for a multi-purpose application by various light emitting effects, could emit the light of two or more colors.

That is, the LEDs of red, green, yellow, white and the like are applicable in combination.

[49] Furthermore, as shown in FIG. 10-15, the reflectors 123 and 123 applied to the LED lighting unit 120 could be modified to have a reflecting portion 123a of various shapes so as to reflect the light emitted from the LEDs at various angles, and thus it could adjust the traveling direction of the light arbitrarily.

[50] Referring to FIG. 10, the reflector could have the straightly inclined reflecting portion.

[51] Referring to FIG. 11, the reflector could have the reflecting portion of a general dome shape.

[52] Referring to FIG. 12, the reflector could have the partially rounded reflecting portion, i. e. the trumpet-shaped reflecting portion.

[53] Referring to FIG. 13, the reflector could have the reflecting portion of a hexagonal polyhedral structure.

[54] Referring to FIG. 14, the reflector could have the reflecting portion of an octagonal polyhedral structure.

[55] In addition, as shown in FIG. 15, the reflectors 123 and 123 preferably have projections formed on a surface of the reflecting portions 123a so as to achieve a multi- angled reflection of more various ways with regard to the emitted light of the LEDs.

[56] In this case, the projections could have a shape of a circle, an ellipse, a triangle, a quadrangle, a pentagon, or a hexagon.

[57] Meanwhile, it would be preferable that the LEDs 121 of the lighting unit 120 are allowed to adjust the brightness by controlling an electrical current with High or Low signals according to the arrangement of the LEDs. For example, the lighting unit WO 2005/085703 PCT/KR2005/000597 includes the arrangement of the upper and lower parts, the High signal is given to the upper part for getting the relatively high brightness and the Low signal is given to the lower part for getting the relatively low brightness.

[58] The cover 130 preferably comprises a body made of a material allowing the light to pass therethrough or made of a transparent material, could have various colors according to the purpose of usage, and could have various shapes appropriate to the ar- rangement of the LED lighting unit 120.

[59] Therefore, the present invention enables various combinations using the stacking and opposite arrangements of the LEDs, could adjust the traveling direction of the emitted light arbitrarily, and could adjust the emitting efficiency easily to conform to the purpose, so that the present invention is especially optmized to be applied to the car.

[60] Preferably, as shown in FIG. 16, the LEDs 121 circumferentially disposed in the upward and downward directions open widely, i. e. spread out widely, so that a driver in other car could easily recognize the LEDs.

[61] More preferably, as shown in FIG. 17, the LED 121 is disposed at the center of the upward printed circuit board 122, and is inserted into the upward reflector 123. Then, when the centered LED 121 emits the light upward, the intensity of the light could be improved so as to be easily recognized.

[62] The present invention is configured to be proper for the signal and brake lamps for the car, and thus should be simple and compact. Accordingly, with the structure as explained above, the present invention achieves the intended object economically without adding the excessive LED lamps and other elements.

[63] For example, in case of the turn signal lamp is used when a driver wants to change direction, if the driver supplies the power to the turn signal lamp, the supplied power is provided to the LED 121 through terminals at a bottom of the socket 110 and the printed circuit board 122 and 122 so as to allow the LED 121 to emit the light. The emitting range and speed of the present invention is greatly improved compared with conventional lighting device, and further the reflector 123,123 are installed in both of the upward and downward directions and the LEDs 121 are provided in both of the upward and downward directions so that the light emitted therefrom is reflected by the reflector 123 and 123'Therefore, the light emitting and spreading ranges are enhanced and the car is easily identified.

[64] Although a number of embodiment have described in the above specification, it should be apparent that the car lighting device using the LED lamp according to the present invention could be embodied in many other specific mode included within the sprit and scope of the present invention. Thus, the present embodiments should be considered as illustrative, and the present invention could be modified within the scope of claims and the equivalent thereof.

[65] Industrial Applicability [66] The present invention is related to a car lighting device in which LEDs are applied to a signal lamp, a brake lamp, a headlight, a breadth indication lamp and the like [67]