CN101315161B

CN101315161B - Multi-prism LED Traffic Signal Light Optical Mask

Info

Publication number: CN101315161B
Application number: CN2007100413447A
Authority: CN
Inventors: 俞伟民; 李建; 屠其飞; 张辉
Original assignee: Shanghai Austar Lighting Electrical Industry Co Ltd
Current assignee: Shanghai Austar Lighting Electrical Industry Co Ltd
Priority date: 2007-05-28
Filing date: 2007-05-28
Publication date: 2010-12-08
Anticipated expiration: 2027-05-28
Also published as: CN101315161A

Abstract

The invention discloses a polygonal column LED traffic signal light optical mask, which is composed of small mask units, and each small mask unit includes more than two layers of polygonal prisms with different inclination angles. The heights of each layer of polygonal prisms are not equal. Each layer of polygonal prism has more than two facets, and the generatrices of each facet are parallel to each other and form different angles with the surface of the mask unit. This optical mask has a good light pattern and a reasonable distribution of luminous flux. While meeting the requirements of optical distribution, it can effectively use luminous flux and significantly improve the utilization efficiency of luminous flux.

Description

Polygon prism LED traffic light optical mask

Technical field

The present invention relates to a kind of Optical devices of the LED of being used for traffic light optical Secondary Design, particularly a kind of polygon prism LED traffic light optical mask.Can reasonably distribute luminous flux by this optics face shield, the luminous flux that the LED traffic lights are reached in the GB distributes requirement, effectively utilizes luminous flux, significantly improves the utilization ratio of luminous flux.

Background technology

(Light Emitting Diode LED) is the luminous semiconductor diode of a kind of energy to light emitting diode, and it is a kind of luminescent device that directly electric energy is converted into light and radiant energy.Light emitting diode has many advantages: operating voltage is low, and power consumption is few, the luminous efficiency height; Stable performance, the life-span is long; Shock resistance, vibration resistance is strong; In light weight, volume is little, and cost is low.The signal that has solved all led colors in 2000 shows problem, thereby LED has possessed all conditions that is applied to the traffic lights field.LED traffic light high color purity, distinct especially, be easy to signal identification.At present, LED has been widely used in the traffic lights field, and progressively substitutes the classical signal lamp.

Along with the development of LED traffic lights, corresponding techniques requires also more and more stricter.China has proposed related request to the LED traffic lights, that is: GB14887-2003.Wherein the LED traffic lights in the light intensity and the allocation proportion thereof of different angles requirement have been proposed.This has proposed new problem just for the LED traffic lights aspect optical design: reach luminous flux and distribute requirement and effectively utilize luminous flux.

LED is applied to the traffic lights field and has experienced simple LED and add dull and stereotyped face shield (do not carry out secondary optics design) and LED is carried out secondary optics two stages of design.Not passing through the LED traffic lights of optical secondary optical design, is directly to add that by the LED at certain half light intensity angle a dull and stereotyped face shield makes.The light that LED sent that traffic lights adopted is with the taper shape space outgoing forwards that distributes, and the center is stronger, outwards weakens gradually, axisymmetricly; The upper and lower part luminous flux of level 0 degree distributes symmetry.But because wherein the luminous flux of level 0 degree above (not comprising level 0 degree) is distributed in not requirement in the GB, thereby the above part of level 0 degree belongs to the waste of luminous flux.LED is carried out the secondary optics design, can make the LED traffic lights when reaching the requirement of GB to the luminous flux distribution, the utilization rate of luminous flux can be greatly improved.Numerous LED traffic lights manufacturers and correlative study mechanism have proposed the scheme of secondary optics design separately, have carried out exploratory, initiative trial at the secondary optics design aspect, wherein are no lack of the example of comparison success.But majority wherein design is only accomplished: reduce or remove the above luminous flux of level 0 degree and distribute, reasonable not enough for the distribution of the following luminous flux of level 0 degree, the raising of luminous flux utilization rate not enough, the luminous flux waste is still relatively seriously.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of polygon prism LED traffic light optical mask.This face shield can reasonably distribute luminous flux, when the luminous flux distribution reaches the GB requirement, effectively utilizes luminous flux, significantly improves the utilization ratio of luminous flux.

The technical scheme that technical problem to be solved by this invention can adopt is:

Polygon prism LED traffic light optical mask is made up of small mask unit one by one, and each small mask unit comprises the multiedge cylinder of two-layer above different angle.

The height of described every layer of multiedge cylinder is unequal.Every layer of multiedge cylinder has plural faceted pebble, and the bus of each faceted pebble is parallel to each other and becomes different angles with the face shield cell surface.

The present invention carries out the distribution of luminous flux at the area ratio of face shield surface projection with each faceted pebble and face shield surface angulation by each faceted pebble, light is carried out the dual control of intensity and angle, finally make the illumination of specifying flux ratio be mapped to the angle of appointment, realize the reasonable distribution of luminous flux, finally reach the GB requirement and improve the luminous flux utilization ratio.Obtain the 5 nearly directional lights of spending through lens from the light at 30 degree, the half luminous intensity angle that LED sends, carry out above-mentioned luminous flux by this face shield again and distribute, luminous flux distributes by designated ratio and specified angle.The final realization: when optical distribution requires in reaching GB, effectively utilize luminous flux, significantly improve the luminous flux utilization rate.The present invention can distribute luminous flux effective and reasonablely, makes the LED traffic lights when reaching the optical distribution requirement, effectively utilizes luminous flux, significantly improves the luminous flux utilization ratio.This model structure distributes rationally, and is simple and be easy to processing.

Description of drawings

Fig. 1 is the side schematic view of the described face shield of polygon prism LED traffic light optical mask of the present invention unit.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the vertical view of Fig. 1.

Fig. 4 is the rearview of Fig. 1.

Fig. 5 is the right view of Fig. 1.

Fig. 6 is the stereogram of the described face shield of polygon prism LED traffic light optical mask of the present invention unit.

Fig. 7 is side, a polygon prism LED traffic light optical mask of the present invention described face shield unit optical projection schematic diagram.

The specific embodiment

For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with the specific embodiment, further set forth the present invention.

Referring to accompanying drawing, polygon prism LED traffic light optical mask adopts certain refractive index materials to make, the small mask unit relevant optical principle of 1. utilizations of evenly arranging on it one by one can draw project on the pairing optics face shield of upper and lower and left and right each the angle light unit faceted pebble and face shield surface become the moral angle; The area of each face of requirement of strength of the respective angles that requires according to reality simultaneously, thus determine that finally each face gets area-be the size of each face.

Small mask unit 1 comprises the multiedge cylinder 11,12,13,14,15 of five layers of different angle, multiedge cylinder 11 has ten above faceted pebbles, and multiedge cylinder 12 has eight faceted pebbles, and multiedge cylinder 13 has eight faceted pebbles, multiedge cylinder 14 has 14 faceted pebbles, and multiedge cylinder 15 has two faceted pebbles.

Each faceted pebble bus is parallel to each other and becomes equal angular with 1 surface, face shield unit.

The area of small mask unit 1 corresponding each faceted pebble has determined to project the light intensity of respective angles.

Among Fig. 7, a parallel ray beam projects on the vertically different angles through behind the polygon prism LED traffic light optical mask of the present invention.Through multiedge cylinder 11,13, become horizontal direction throw away as light, the light that penetrates through multiedge cylinder 12,14,15 deflects down, Zhe She angle wherein, and multiedge cylinder 12 maximums, multiedge cylinder 14 takes second place, multiedge cylinder 15 minimums.

Adopt above principle, can realize: the light of designated ratio arrives on the angle of appointment.Thereby this optics face shield can be realized the reasonable distribution to luminous flux, makes the LED traffic lights in the optical distribution requirement, effectively utilize luminous flux in reaching GB, significantly improves the luminous flux utilization rate.

Claims

1. Multi-prism LED traffic signal optical mask is characterized in that, is made up of one by one small mask unit, and each small mask unit (1) comprises the first polygonal prism (11) of five layers of different inclination angles, the second polygonal prism (12), the third polygonal prism (13), the fourth polygonal prism (14), the fifth polygonal prism (15), the first polygonal prism (11), the second polygonal prism (12) , the height of the second polygonal prism (13), the third polygonal prism (14), and the fifth polygonal prism (15) are not equal; the first polygonal prism (11) has more than ten facets, and the second multi-prism The prism (12) has eight facets, the third polygonal prism (13) has eight facets, the fourth polygonal prism (14) has fourteen facets, and the fifth polygonal prism (15) has two all of the first polygonal prism (11), the second polygonal prism (12), the second polygonal prism (13), the third polygonal prism (14), the fifth polygonal prism (15) The generatrices of the facets are parallel to each other and form different angles with the surface of the mask unit (1); the light is projected horizontally through the first polygonal prism (11) and the third polygonal prism (13), and passes through the second polygonal prism ( 12), the light rays emitted by the fourth polygonal prism (14) and the fifth polygonal prism (15) are deflected downward, wherein the angle of refraction is the largest in the second polygonal prism (12), and the fourth polygonal prism (14) Secondly, the fifth polygonal prism (15) is the smallest; the area of each corresponding facet of the small mask unit (1) determines the light intensity projected to the corresponding angle.