KR200254872Y1 - Led signal light - Google Patents

Abstract

The LED illuminator comprises a light source consisting of a plurality of LEDs mounted on a circuit board, the light emitted from the optically adjustable front cover, the outer surface of the front cover being a smooth surface and the inner surface of the front cover opposite the LEDs. It is provided with a plurality of lens cells. Both the longitudinal section and the cross-sectional structure of the lens cell form an arcuate curve, and one end of the arcuate curve does not meet the smooth surface. In order to redistribute the light in the vertical and horizontal directions, and to adjust the orientation of the light to a particular illumination area, the light emitted from the LED is optically adjusted with multiple lens projections on the lens cell.

Description

LED illuminator {LED SIGNAL LIGHT}

The present invention relates to a light emitter, and more particularly, to a light emitting diode (LED) signal light with an optical modulating front mantle. Here, the light emitted from the LED is adjusted with a plurality of lens protrusions arranged in series in opposite lens cells opposite the LED, thus redistributing the vertical and horizontal components of the light to emit the LED light so as to be fully applied to a particular area.

Most of conventional light equipments such as traffic lights and traffic lights use incandescent lamps as light sources, but reflecting defects such as power consumption and lifespan, which sometimes need replacement, reflecting lights that reflect the daylight so that the driver cannot see ahead and Defects are found in particular in light emission schemes which consume light energy emanating upwards.

Compared with incandescent lamps, monochrome LED lamps consume less power, generate less heat, and have a longer lifetime. If the LED light source is applied to traffic lights, traffic lights, etc., it has been reported that it saves up to 80% of electrical energy, reduces maintenance costs and thus the frequency of replacement, and avoids the sun reflection that can put the driver at risk. It can be said.

However, considering the relatively small emission angle, the weaker the radiant energy (luminance), the shorter the effective transmission distance of the LED light source, and requires optical adjustment when applied to long distance illumination. Optical adjustment adjusts and redistributes the direction of the LED light to ensure that most of the light is at a minimum LED quantity in a specific area to meet the testing standards for signal light and / or lighting devices, such as the Traffic Light Standards of the Institute of Transportation Engineers (ITE). Can be projected to focus.

In the embodiment of the 'LED lamp comprising a diffractive lens element' of the conventional US Patent No. 5,174,649 shown in FIGS. 1A and 1B, the light emitted from the LED light source 904 upon incident on the light incident surface 900 is parallel light. Arrange a plurality of concave-convex lenses 901 on the light incident surface 900 of the shade 90 to adjust to 905. Parallel light 905 then leaves the light incident surface 900 and travels through the outer surface 902 of the light incident surface, and a plurality of arcuate projecting fillets 903 vertically attached to the outer surface 902. Emitted through. In this case, although optically adjusting the light, some defects are found as follows.

(1) The light portion above the viewing standard of the pedestrian or driver is wasted.

(2) The arcuate projecting fillet 903 is contaminated and easily degrades its natural function.

In another embodiment of the prior art US Pat. No. 5,343,330 shown in FIG. 2, a dual diffraction and total reflection solid non-imaging lens, the storage cell 910 comprising an LED light source is recessed behind a plurality of lenses 91 Where the LED light is diffracted by the diffraction layer 911 or totally reflected by the reflecting surface 912 and then passes through the diverging surface 913 with parallel or converged beams. In this case, optical adjustment was made, but some defects were found and described below.

(1) The light portion above the viewing standard of the pedestrian or driver is wasted.

(2) As all the LEDs are plugged into the storage cell 910 and soldered, it is more difficult to assemble a plurality of LEDs and lenses by mounting a printed circuit board (PCB).

In an embodiment of the LED lighting lamp assembly, another conventional US Pat. No. 5,833,355, shown in FIGS. 3A and 3B, a plurality of flat mirror bands 92 horizontally placed on the bottom surface of the shade, It is divided into upper half and lower half 920, 923 for adjusting the corresponding column. The upper half 920 further includes a plane 921 and a curved surface 922 for diffracting light downward, and the lower half 923 has a flat or curved top 924 and a bottom with a number of arcuate projecting fillets. And further includes 925. Here the arcuate projecting fillet of the lower part 925 is provided for horizontal light adjustment, and the upper part 924 is provided for light transmission. In this case the light is adjusted in the direction of travel and the light portion above the horizontal reference is removed, but there are still some defects as follows.

(1) Planar mirror bands tend to form light in bands that reduce light distribution.

(2) Since the upper half of the mirror band cannot be adjusted horizontally, an image deviation related to the lower half is formed, which affects the visual effect.

The optical adjustment for the LED illuminant of the present invention is useful for eliminating the above-mentioned deficiency by the improvement of the prior art. LED emitters include a number of LEDs used for light sources mounted on a circuit board, and light is emitted through an optically adjustable front cover. The outer surface of the front cover is a smooth surface (light emitting surface), and the inner surface (light incident surface) has a plurality of lens cells located opposite the LEDs, where the lens cells perform optical adjustment functions. can do. A plurality of lens protrusions are formed on the surface of the lens cell opposite to the LED, and have the same or different curvature and are continuously arranged in the vertical and horizontal directions. Both longitudinal and cross-sectional structures of the lens cells are arcuate but open toward the smooth surface. After reorientation with a plurality of lens projections of the lens cell, the light from the LED light source is readjusted and redistributed so as to be emitted in some specific areas, so that the LED light source can be efficiently used.

The main technical task of the present invention is to provide an LED illuminant in which a plurality of lens cells are placed on the light incidence plane of the front cover, modulating the vertical components of the light to emit some specific areas, and adjusting the optical components of the lens cells to optical To redistribute.

Another technical problem to be achieved by the present invention is to arrange a plurality of lens protrusions having the same or different curvature on the light incident surface of the lens cell, thereby providing a plurality of light spots to uniformly redistribute the light emitted from the light source ( light point).

Another technical problem to be achieved by the present invention is to provide an LED illuminant that can reassemble a plurality of lens cells to form a front cover under any intended shape and arrangement based on a unit lens cell.

Another technical problem to be achieved by the present invention is to provide an LED illuminant which is a smooth surface on which the light emitting surface of the front cover blocks dust.

For more detailed information on the advantages or characteristics of the present invention, at least one of the preferred embodiments is described below with reference to the accompanying drawings.

Related drawings linked to the detailed description of the present invention to be described below will be described briefly in the previous description of the drawings.

1A is a plan view of the light-casting path of US Pat. No. 5,174,649.

1B is a side view showing the light emission path of US Pat. No. 5,174,649.

Figure 2 is a side view showing the longitudinal section and the light emission path of another US Patent No. 5,343,330.

3A is a partial perspective view of a flat mirror band of another US Pat. No. 5,833,355.

3B is a side view showing the light emission path of US Pat. No. 5,833,355.

4 is a longitudinal sectional view of an embodiment of the present invention showing that a lens cell is positioned opposite the LED.

5 is a view showing the incidence surface of the front cover of the present invention.

6 is a three-dimensional schematic diagram showing the lens cell of the present invention.

6A is a longitudinal sectional view of the lens cell of the present invention.

6B is a cross-sectional view of the lens cell of the present invention.

7 is a schematic view showing a longitudinal section and the light emitting path of the present invention.

7A is a diagram showing a plurality of long range observation positions from a lens cell.

8 is a view showing a longitudinal section and the light emitting path of the present invention.

8A is a diagram showing a plurality of long-range observation positions that are vertically symmetrical from a lens cell.

9 is a plot showing luminance in front of the lens cell.

9A is a diagram illustrating a first image when the lens cell is observed on a horizontal basis from the front of the lens cell.

9B is a view illustrating a second image when viewed from below 3 ° on a horizontal basis from the front of the lens cell.

9C is a view illustrating a third image when viewed from below 5 ° on a horizontal basis from the front of the lens cell.

10 is a perspective view of a second embodiment of a lens cell of the present invention.

11 is a perspective view of a third embodiment of a lens cell of the present invention.

12 is a perspective view of a fourth embodiment of a lens cell of the present invention.

13 is a perspective view of a fifth embodiment of a lens cell of the present invention.

13A is a longitudinal sectional view of a fifth embodiment of a lens cell of the present invention.

14 is a perspective view of a sixth embodiment of a lens cell of the present invention.

14A is a longitudinal sectional view of the sixth embodiment of a lens cell of the present invention.

15 is a perspective view of a seventh embodiment of a lens cell of the present invention.

15A is a longitudinal sectional view of the seventh embodiment of a lens cell of the present invention.

As shown in Fig. 4, the LED (light emitting diode) signal lamp of the present invention through Figs. 6, 6A and 6B has a plurality of LED light sources 20 coupled to the circuit board 2 and the front for optical adjustment. Cover 1.

The outer surface of the front cover 1 is a flat surface, a convex surface or an arcuate concave surface (a surface from which light exits), while in this case a flat surface. The inner surface of the front cover 1 (light incidence surface) is provided with a plurality of lens cells 11, which lens cells 11 are substantially spaced to fit the shape of the cause front cover 1 in this embodiment. Without this arrangement, the lens cells 11 may be arranged at intervals or may be mixed with each other.

The lens cell 11 is basically a circular or polygonal lens when viewed from the front end, and in this embodiment, a hexagonal lens is used for light adjustment, and the lens cell 11 is placed corresponding to each LED light source 20. . As shown in FIGS. 6A and 6B, the vertical arcuate curve 111 is considered in comparison with the individual arcuate curves 111 and 112 in which one end portion does not meet the smooth surface in the longitudinal section and the cross section of the lens cell 11. The end that does not meet the smooth surface of is slanted downward slightly while the horizontal arcuate curve 112 is symmetric on both sides. The convex surface of the lens cell 11 opposite to the LED 20 has a plurality of radii having different radii arranged in a vertical and horizontal direction to form a lens cell 11 that is tightly filled with the lens protrusion 110 for optical adjustment. Is provided with a continuous lens projection 110, wherein the radius of each lens projection 110 in the vertical and horizontal direction is different from each other.

7 and 7A, light rays of the LED light source 20 perpendicular to the lens cell 11 pass through the lens protrusion 110 and are focused in front of the lens cell 11 for adjustment. In FIG. 7A, a plurality of predetermined positions about 1 m away from the lens cell 11 may allow the observer to sequentially observe the visual image of the LED light source in all the lens cells 11, as shown in FIGS. 9 and 9A to 9C. So that it is about 1 m away from the lens cell 11 at equal intervals of 5 degrees. The vertical arcuate curve 111 has an end portion at which one does not meet the smooth surface, and the end portion is curved toward the smooth surface, thereby adjusting a part of the upwardly converging light (angle 0 °) from the LED light source 20 to be horizontal. Bend to a position below the reference and dispense again in the expected direction and area.

The light emitted from the LED light source 20 shown in FIGS. 8 and 8A is adjusted in the lens projection 110 and then re-assigned to be focused in front of the lens cell 11 and emitted to some horizontal position or area. In FIG. 8A, the positions and regions spaced apart from the lens cell 11 are approximately from the lens cell 11 so that the observer can observe the visual image of the LED light source in sequence in all the lens cells 11 as shown in FIGS. 9 and 9A to 9C. 1m away. The horizontal arcuate curve 112 is symmetrical and can adjust the horizontal component of the LED light source 20 to reallocate light to emit some specific area. From FIG. 9, which is a diagram of a first embodiment of the present invention showing the luminance in front of the lens cell 11, the path of the single LED light source 20 is adjusted by the lens cell 20, redistributed to be a plurality of illumination portions, and strictly. In other words, the light is emitted to the lens protrusions 110 in which the lens cells 11 are arranged in a rough manner, and extends into a good number of small light emitters that can form a substantially parallel light source that effectively serves as a traffic light. . In FIGS. 9a to 9c, the visual image is viewed at different points at different angles about 1m in front of the LED light source, where the observer stands in a horizontal position in FIG. 9a and is inclined downward by 3 ° on a horizontal basis in FIG. 9b. In FIG. 9C, the inclined position is 5 ° below the horizontal reference. Because of the lens protrusions 110 having different radii arranged in the respective lens cells 11, the LED point light source can be adjusted to be a planar light source with better efficiency.

In the second embodiment of the present invention shown in Fig. 10, the lens cells 31 are divided into upper and lower parts, and they are formed in successive lens projections of different widths so as to form lens projections 310 and 311 at different densities. 310 and 311 are further provided. The lens protrusion 310 of the upper half of the lens cell 31 has a larger width and a smaller density, while the lens protrusion 311 has a smaller width and a higher density. In addition, the lens protrusions 311 are linearly arranged, and the horizontal arcuate curve of the lower half of the lens cell 31 can extend laterally without limitation and is applied to the LED illuminant system.

11 and 12 respectively show the third and fourth embodiments of the present invention, and the lens cells 41 and 51 having the front appearance of a circular or rectangular shape can be subjected to the same optical adjustment as that of the lens cell 11. Can be.

13 and 13A, in the fifth embodiment of the present invention, the curvature in the vertical direction of the lens protrusion 610 on the lens cell 61 may be infinitely extended to become a line having the same height, and the lens cell ( Lens projection 610 of 61 redistributes vertical light using diffraction.

In the sixth embodiment of the present invention shown in Figs. 14 and 14A, a plurality of consecutive vertical and horizontal lens protrusions 710 on the lens cells 71 have a curvature of sound (concave curve) to redistribute vertical light through divergence. Bent to

In the seventh embodiment of the present invention shown in Figs. 15 and 15A, the plurality of lens protrusions 810 on the lens cells 81 are distributed so as to be symmetrical up and down. According to the longitudinal section shown in FIG. 15A, the surface of the lens protrusion 810 is constructed substantially in the form of an arcuate curve 811 when viewed from the side, where the cutline centerline 812 of the arcuate curve 811 is horizontal Towards By arranging the lens protrusion 810 in this manner, the light is modulated, focused and redistributed, so that the present invention can thus be applied to long-range uses that typically require light emission on horizontal references such as highway traffic lights.

As described above, at least one embodiment is described in detail with reference to the accompanying drawings, and many modifications and variations are possible without departing from the spirit and scope of the present invention as set forth in the claims below.

The present invention allows the vertical component of the light to be modulated to emit in some specific areas, the horizontal component of the light to be redistributed by the optical adjustment of the lens cell, and the light emitted from the light source to multiple redistribution of scattered light uniformly. point).

In addition, it is possible to reassemble a plurality of lens cells in the LED emitter to form the front cover under any intended shape and arrangement based on the unit lens cell, and the light emitting surface of the front cover to block dust.

Claims (17)

An LED emitter comprising a light source comprising a plurality of LEDs (light emitting diodes) mounted on a circuit board, wherein light is cast from an optically adjustable front mantle, The outer surface of the front cover is a smooth plane and the inner surface has a plurality of lens cells located opposite to the LED, the longitudinal cross section and the transverse cross section of the lens cell The structure of the arcuate curve, one end of the arcuate curve does not meet the smooth surface, A plurality of lens protrusions having different curvatures in the vertical and horizontal directions are arranged continuously in a vertical and horizontal direction on the lens cell opposite to the LED, Wherein the light emitted from the LED is optically adjusted with the plurality of lens projections on the lens cell to redistribute the light in the vertical and horizontal directions and to adjust the orientation of the light to a specific illumination area. The method of claim 1, The LED illuminant of the front cover is a flat surface. The method of claim 1, LED front light emitting surface of the front cover is a convex surface or concave surface. The method of claim 1, The lens cell is LED light emitting body arranged to fit the shape of the front cover without gaps. The method of claim 1, LED light emitting body is formed in a circular appearance of the lens cell. The method of claim 1, The arcuate curve in the vertical direction of the lens cell has an end portion which does not meet the smooth surface on one side, the end portion is parallel to the smooth surface or bent toward the smooth surface. The method of claim 1, The arcuate curve in the horizontal direction of the lens cell is a straight line LED having an infinite radius of curvature. The method of claim 1, The curvature radius of the arcuate curve of the lens cell is the same in the vertical direction and the horizontal direction. The method of claim 1, The radiator of curvature of the lens projection on the lens cell is the same in the vertical direction and the horizontal direction LED light emitting body. The method of claim 1, The horizontal curvature radius of the lens projection on the lens cell gradually increases as the distance from the center of the lens projection. The method of claim 1, The lens projections on the lens cells are provided at different widths, i.e., different densities, in the upper half and the lower half thereof. The method of claim 1, LED curvature in the longitudinal direction of the lens projection is an infinite straight line. The method of claim 1, LED curvature of the lens projection in the transverse direction is concave and negative value. The method of claim 1, The lens cells are arranged at intervals therebetween, LED light emitting body arranged to match the shape of the front cover. The method of claim 1, The lens cells are arranged using a mixture of the method of arranging at intervals between them and the arrangement between them. The method of claim 1, LED light emitting body is formed in a polygonal appearance of the lens cell. The method of claim 1, The horizontal curvature radius of the lens projection on the lens cell gradually decreases away from the center of the lens projection.