KR20030004652A - Traffic signal - Google Patents

Abstract

PURPOSE: A traffic signal is provided to increase downward and sideward brightness without additional lamps. CONSTITUTION: The traffic signal is formed by installing a PCB(Printed Circuit Board,1) attached with LED(Light-Emitting Diode,3) to be inclined sideward or downward at an angle of approx. 5-15 degrees, wherein a lens(4) which becomes thicker downward and sideward is installed to the whole or portion of a luminous part to send out upward and forward lights downward or sideward.

Description

Traffic signal

Conventional shell type light emitting diodes have a directivity to focus and emit light within a specific angle, and emit light symmetrically with respect to the vertical axis of the light emitting diodes. When manufacturing a traffic light using such a diode, about 1/2 of the light emitted is emitted upward, that is, toward the sky, and is wasted because it does not help drivers or pedestrians recognize the signal.

Here, the downward direction refers to the direction of the ground when the traffic light is placed in the form of being installed on the street, and the lateral direction refers to the direction of looking at the traffic light from the side.

In addition, if the brightness is increased to satisfy the brightness in the downward direction or the lateral direction, the front brightness increases more than necessary and the number of diodes used increases. This problem is not only a problem of a traffic light using a light emitting diode but also a signal light using a conventional light bulb.

Signal lamps using light emitting diodes are more expensive than light bulbs, compared to conventional light bulbs. However, the cost of light emitting units is still higher than that of light bulbs.

However, if the light emitted upward of the traffic light can be redirected downward or sideways, the number of light emitting diodes used can be reduced as well as power consumption.

1: Schematic diagram of a cross section of a traffic light with the substrate tilted downward

2 is a schematic cross-sectional view of a substrate inclined with a light emitting diode

Figure 3: Partial cross-sectional schematic of the lens

4: Partial cross-sectional schematic of the lens

Fig. 5: Partial cross-sectional schematic of the lens

* Explanation of each code in the drawing

(1) substrate

(2) inclination angle of the substrate

(3) light emitting diode

(4) lens

(5) substrate

(6) light emitting diode

(7) inclination angle of light emitting diode

(8) lens front view

(9) Vertical cross-sectional schematic of the lens center

(10) Horizontal section of the lens

(11) prism-shaped projection

12 lens

(13) Lens Front Schematic

(14) Vertical cross-sectional schematic of the lens center portion

(15) Schematic diagram of horizontal section of lens center part

The present invention is to solve this problem using the following method.

As shown in FIG. 1, a PCB substrate such as a signal lamp equipped with a light emitting diode is mounted at an angle so that the substrate surface faces an angle of about 15 degrees downward (ground). In addition, as shown in FIG. 2, the substrate is installed vertically, but the lamp is fixed to the PCB substrate so that the lamp faces downward (ground) by about 15 degrees, thereby changing the direction of the light emitted from the light emitting part as a whole. And the light emitted toward the ground or the side increases to increase the brightness in the downward or side direction.

Secondly, as shown in FIG. 3, the light is thicker toward the front of the light emitting part in the downward direction, and the light that goes upward and the light toward the front is lowered by using a lens that becomes thicker as it moves away from the center of the light emitting part in the lateral direction. Sending in the direction or side can increase the brightness in the downward or lateral direction. The same effect can be obtained by manufacturing the lens with a hologram lens. In this case, the light emitted from the light emitting part is refracted in the ground direction as a whole and is also refracted in both directions to reduce the amount of light going upward, and the amount of light increases in the ground or in both directions. This hologram lens can be used to send light emitted upwards or downwards more efficiently, depending on the lens design. FIG. 5 illustrates the lens illustrated in FIG. 3 in the form of a hologram lens and plays the same role as the lens of FIG. 3.

In addition, when the lens is manufactured as shown in FIG. 4 and installed so that the thick portion of the prism-shaped protrusion faces downward, the light emitted from the light emitting part may be bent toward the ground to increase the luminance toward the ground.

Compared with the existing traffic lights, the brightness in the down and side directions can be increased without the addition of a lamp.

Claims (10)

In a traffic light using the light emitting diode as the main display light source, as illustrated in FIG. 1, all or part surfaces of the substrate 1 to which the light emitting diode is attached are inclined at an angle in a lateral direction or a downward direction. 2. A traffic light according to claim 1, wherein the angle of inclination (2) of the substrate is in the range of 5 degrees to 30 degrees. In a traffic light using a light emitting diode as a main display light source, a traffic light in which all or a part of the light emitting diode installed on the substrate is inclined downward or sideward with respect to the surface of the substrate as illustrated in FIG. 2. 4. A traffic light as claimed in claim 3, wherein the angle of inclination (7) of the light emitting diode is in the range of 5 degrees to 30 degrees. In a traffic light using a light emitting diode as a main display light source, the light is attached to all or part surfaces of the light emitting portion, and as shown in FIG. 3, the thickness becomes thicker toward the bottom and thicker from the center to both sides. Traffic lights including losing lens. 6. A traffic light as set forth in claim 5, comprising a lens having projections for scattering light on both or one side of all or part of the land. In a traffic light using a light emitting diode as a main display light source, a traffic light including a lens attached to a front surface or a partial surface of a light emitting unit, and having a prism-shaped projection formed on at least one surface of both surfaces in a predetermined direction as illustrated in FIG. 4. . 8. A traffic light as claimed in claim 7, comprising a lens having a prism shaped projection formed on at least one of both surfaces of all or part of the lens. In a traffic light using a light emitting diode as a main display light source, a traffic light including a lens attached to all or part of the front surface of the light emitting unit and having a cross section of the shape illustrated in FIG. 5. A traffic light using a light emitting diode as a main display light source, comprising: a hologram lens for increasing the amount of light in the downward and lateral directions by refracting the light downward or laterally in front of the light emitting portion.