CN106931402A - A kind of LED traffic signal light lens mask - Google Patents

Abstract

The present invention provides a lens mask for LED traffic signal lamps, which includes Fresnel lenses of different shapes and lens holders, the Fresnel lenses of different shapes are spliced and combined to form an arrow shape, and the Fresnel lenses are fixed on the lens holder. Fresnel lenses of different shapes are four rhombic Fresnel lenses and two rectangular Fresnel lenses. A lens mask for an LED traffic signal light disclosed by the present invention adopts a plurality of Fresnel lenses of different shapes to splice and combine to form a collimated light field shape, and each Fresnel lens corresponds to an LED module. The effect of collimating different light field patterns by using multiple Fresnel lenses is better than that of using a whole Fresnel lens, and the sharpness of the patterns is greatly improved. Through this splicing and combination form, multiple Fresnel lenses can be spliced and combined to form different shapes required by traffic lights.

Description

A kind of LED traffic signal light lens mask

technical field

The invention belongs to the technical field of optical masks, in particular to an LED traffic signal lamp lens mask.

Background technique

As a new light-emitting device with stable luminous performance, high photoelectric conversion efficiency and strong environmental tolerance, light-emitting diodes have been widely used in the field of traffic lights. In this field, two methods are usually used to realize traffic signal patterns with specific indication functions: the first one is to use multiple in-line low-power LED lamp beads to arrange traffic signal patterns; the second one is to use high-power LED , Fresnel lens and circular traffic signal pattern of pillow-shaped fly-eye lens array for light shielding to realize specific traffic indication pattern. Existing high-power LED traffic lights usually use a single-shaped Fresnel lens to collimate the large-angle outgoing beams from seven high-power LEDs. However, the peak brightness of the high-power LED light source on the market is relatively strong. When the human eye directly looks at the LED light source, it will cause discomfort, serious glare problems, and serious damage to the human eye. Therefore, secondary optical design is required for the light emitted by the LED.

In the secondary optical design, the method that can be adopted is: use the combination of optical mask, lens and LED to achieve the specific optical effect required by the signal light.

Contents of the invention

The present invention aims to solve the above-mentioned technical problems, and provides a lens mask for LED traffic signal lights with low glare and good visual effect.

In order to solve the technical problems of the present invention, the present invention is achieved through the following technical solutions: a LED traffic signal light lens mask, comprising Fresnel lenses of different shapes and lens holders, the Fresnel lenses of different shapes are spliced and combined to form Arrow shape, the Fresnel lens is fixed on the lens holder; the Fresnel lenses of different shapes are four rhombic Fresnel lenses and two rectangular Fresnel lenses.

Preferably, for the four rhombic Fresnel lenses, two pattern faces are upward and two pattern faces are downward.

Preferably, the pattern surfaces of the lens mask formed by splicing and combining the four rhombic Fresnel lenses and the two rectangular Fresnel lenses are all upward.

Preferably, each Fresnel lens corresponds to an LED module, and the Fresnel lens is designed to be in a shape consistent with the light field pattern according to the different light field patterns emitted by each LED module, so as to achieve different light field patterns for alignment purposes. The effect of collimating different light field patterns by using multiple Fresnel lenses is better than that of using a whole Fresnel lens, and the sharpness of the patterns is greatly improved. Through this splicing and combination form, multiple Fresnel lenses can be spliced and combined to form different shapes required by traffic lights.

Preferably, the central position of the Fresnel lens is consistent with the central position of the light field pattern emitted by each LED module, so as to improve the collimation effect.

Compared with prior art, the beneficial effect that the present invention obtains is:

An LED traffic signal light lens mask provided by the present invention adopts a plurality of Fresnel lenses of different shapes to form the required collimated light field shape. Each Fresnel lens corresponds to an LED module, and each Fresnel lens According to the different light field patterns emitted by each LED module, the Seoul lens is designed into a shape consistent with the light field pattern, so as to achieve the purpose of collimating different light field patterns. The effect of collimating different light field patterns by using multiple Fresnel lenses is better than that of using a whole Fresnel lens, and the sharpness of the patterns is greatly improved. Through this splicing and combination form, multiple Fresnel lenses can be spliced and combined to form different shapes required by traffic lights.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of the structure of the lens holder.

Fig. 3 is a schematic diagram of the structure of the LED module.

Fig. 4 is a schematic diagram of the use of the present invention.

Reference signs: 10, lens mask; 1, Fresnel lens; 11, rhombic Fresnel lens; 12, rectangular Fresnel lens; 2, lens holder; 3, LED module; 31, high-power LED; 32 . Total internal reflection TIR lens; 33. Diffractive optical element; 4. Fly-eye lens.

detailed description

The embodiments will be described in detail below in conjunction with the accompanying drawings.

Referring to accompanying drawing 1 and accompanying drawing 2, a kind of LED traffic signal light lens cover 10, comprises the Fresnel lens 1 of different shapes and lens holder 2, and the Fresnel lens 1 of described different shapes is spliced and combined to form arrow shape, and described The Fresnel lens 1 is fixed on the lens holder 2; the Fresnel lenses 1 of different shapes are four rhombic Fresnel lenses 11 and two rectangular Fresnel lenses 12.

Further, for the four rhombic Fresnel lenses 11, two pattern faces are upward and two pattern faces are downward.

Further, the surface of the pattern of the lens mask 10 formed by splicing and combining the four rhombic Fresnel lenses 11 and the two rectangular Fresnel lenses 12 is all upward.

Further, each Fresnel lens 1 corresponds to an LED module 3, and the LED module 3 realizes various functions required for traffic indication by combining a high-power LED 31, a total internal reflection TIR lens 32, and a diffractive optical element 33. Type pattern, its main structure is shown in Figure 3.

Referring to accompanying drawing 4, a kind of LED traffic signal lamp lens cover 10 uses schematic diagram. The large-angle scattered light emitted by the high-power LED 31 in a single LED module 3 is condensed by the total internal reflection TIR lens 32 and then irradiated on the diffractive optical element 33; the light field distribution with a specific pattern after shaping is irradiated on each LED module On the Fresnel lens 1 corresponding to 3, a plurality of Fresnel lenses 1 of different shapes constitute a lens mask 10 of an LED traffic signal light according to the present invention. The distance between the light emitting surface of the LED module 3 and the Fresnel lens 1 is the focal length of the Fresnel lens 1 , which realizes the collimation of the shaped light field. After the collimated light field distribution passes through the shaping fly-eye lens 4 , the outgoing light field distribution meets the requirements for light energy distribution in the national standard of traffic signal lights GB14887-2011.

The Fresnel lens 1 is designed to have a shape consistent with the light field pattern according to the different light field patterns emitted by each LED module 3 , so as to achieve the purpose of collimating different light field patterns. The effect of collimating different light field patterns by using multiple Fresnel lenses 1 is better than that by using a single Fresnel lens, and the sharpness of the patterns is greatly improved. Through this splicing and combination form, multiple Fresnel lenses can be spliced and combined to form different shapes required by traffic lights.

Further optionally, the center position of the Fresnel lens 1 is consistent with the center position of the light field pattern emitted by each LED module 3, so as to improve the collimation effect.

Further, the traffic indication pattern can be composed of light field patterns emitted by a single LED module 3 , or can be realized by splicing light field patterns emitted by multiple LED modules 3 .

What is listed above is only one of the specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many similar modifications are possible. All deformations that can be directly derived or associated by those skilled in the art from the content disclosed in the present invention should be considered as the protection scope of the present invention.

Claims (3)

1. A kind of LED traffic light lens mask, it is characterized in that: comprise the Fresnel lens of different shapes and lens holder, the Fresnel lens of described different shapes is spliced and combined to form arrow shape, and described Fresnel lens is fixed on the The Fresnel lenses of different shapes are four rhombic Fresnel lenses and two rectangular Fresnel lenses. 2. A LED traffic signal light lens mask as claimed in claim 1, characterized in that: for the four rhombic Fresnel lenses, two pattern faces are upward and two pattern faces are downward. 3 . The lens mask for LED traffic signal lights according to claim 2 , wherein the pattern surfaces of the lens mask formed by splicing and combining the four rhombic Fresnel lenses and the two rectangular Fresnel lenses are all upward. 4 .