Unlock instant, AI-driven research and patent intelligence for your innovation.

Traffic signal light taking high power LED as light source high power LED

A traffic signal light and LED surface light source technology, which is applied in the field of traffic signal lights, can solve the problems of high price, large number of LEDs, and short service life, and achieve the effects of improving light energy utilization, reducing use costs, and long service life

Inactive Publication Date: 2010-06-09
CHINA JILIANG UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The incandescent lamp emits white light, and it needs to pass through the "colored filter" to get the required red, yellow, and green traffic signal lights. The incandescent lamp also needs to add a reflective bowl to increase the energy of the light emitted forward. After "mirror" filtering, the power consumption is large, the brightness is low, and the service life is short
Low-power LED traffic lights, due to the lack of optical treatment, the light of the light-emitting diodes is not fully utilized, the number of LEDs configured is large, the cost is high, and the price is expensive. Due to the large number of LED tubes used, its reliability is poor, and there are Disadvantages of light spots and dark areas

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Traffic signal light taking high power LED as light source high power LED
  • Traffic signal light taking high power LED as light source high power LED
  • Traffic signal light taking high power LED as light source high power LED

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: LED surface light source 1 is a 4×2 array of red LEDs. Each LED light-emitting chip is 1mm×1mm. After being packaged with silica gel, it can be regarded as a light-emitting surface with a diameter of 8mm. The luminous intensity is 60cd, and the half-intensity angle is 120 degrees. Total reflection compound lens 3 is made up of 4 basic surfaces, such as image 3 As shown, a is a conical surface with a cone angle of 70 degrees, b is a circular plane with a size of Ф2mm, c is a conical surface with a total reflection surface and a cone angle of 15 degrees, d is an aspheric surface, and the surface trajectory equation is:

[0025] The parameters are set as: R=-7.356mm, K=-70.178, A=-1.8e-5mm -3 , B=2.34e-7mm -5 , C=-2.338e-10mm -7 , D=-5.536e-12mm -9 , E=3.178e-15mm -11 The focal length of the Fresnel lens 4 is 150mm; the microlens array astigmatism sheet 5 is composed of a 6×6mm square plano-convex lens, and the focal length of a single microlens is 40mm....

Embodiment 2

[0026] Example 2: LED surface light source 1 is a 4×3 array of yellow LEDs. Each small light-emitting chip is 1mm×1mm. After being packaged with silica gel, it can be regarded as a light-emitting surface with a diameter of 10mm. The luminous intensity is 66cd, and the half-intensity angle is 120 degrees. Total reflection compound lens 3 is made up of 4 basic surfaces, such as Figure 4 As shown, a 1 is a conical surface, the cone angle is 3.5 degrees, b 1 It is a spherical surface with a radius of curvature of 52.5mm, c 1 is a compound paraboloid, the surface trajectory equation is: L=a'(1+sinθ i )cotθ i / sinθ i =(a+a')cotθ i , f=a'(1+sinθ i ), where the parameters are set as: a=22mm, a'=6mm, θi=25°, d 1 As an aspheric surface, the surface trajectory equation is:

[0027] The parameters are set as: R=45.55mm, K=-3.582, A=-2.351e-5mm -3 , B=8.978e-7mm -5 , C=-4.92e-10mm -7 , D=1.2376e-12mm -9 , E=-5.248e-15mm -11 The focal length of the Fresnel lens 4 is 160mm...

Embodiment 3

[0028] Example 3: LED surface light source 1 is a 5×1 array of green LEDs, and each small light-emitting chip is 1mm×1mm. After being packaged with silica gel, it can be regarded as a light-emitting surface with a diameter of 10mm. The luminous intensity is 50cd, and the half-intensity angle is 120 degrees. Total reflection compound lens 3 is made up of 4 basic surfaces, such as Figure 5 As shown, a 2 is a conical surface, the cone angle is 90 degrees, b 2 plane, c 2 is a compound paraboloid, the surface trajectory equation is: L=a'(1+sinθ i )cotθ i / sinθ i =(a+a')cotθ i , f=a'(1+sinθ i ), where the parameters are set as: a=28mm, a'=10mm, θi=30°, d 2 is a plane, the focal length of the Fresnel lens 4 is 180mm; the microlens array diffuser 5 is composed of a 7×7mm square plano-convex lens, and the focal length of a single microlens is 30mm. The traffic signal lamp realizes a luminous light source with a luminous surface diameter of 300 mm, a luminous angle of 35 deg...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a traffic light, the illuminant of which is high-power LED, and belongs to the technical field of traffic lights. The invention comprises an LED light source and an encloser. The invention is characterized in that the LED light source is arranged on the bottom of a lamp holder with cooling fins and is matched with the bottom of the lamp holder; a total reflection compound lens is arranged on and matched with the front end of the lamp holder; the lamp holder is matched and connected with the rear end of the encloser; the front end of the encloser is connected with a Fresnel lens and a microlens array focussing screen in turn. The LED light source 1 consists of corresponding high-power LED colored chips arrays. The invention adopts the high-power LED light source to realize the reasonable distribution of high-power LED luminous flux through the optical processing of the total reflection compound lens, the Fresnel lens and the microlens array focussing screen, the utilization ratio of the luminous energy can be improved. In this way, the power consumption of the traffic light is significantly saving and the use cost is effectively reduced. Red, yellow and greensignal lights can be directly acquired through the corresponding high-power LED colored chips. The power consumption of the invention is low; the brightness is high and the service life is long. In addition, the invention can realize the light spots from 200 mm to 400 mm and the angles of the beam ranging from 40 degrees and 100 degrees.

Description

technical field [0001] The invention belongs to the technical field of traffic signal lamps, and in particular relates to a traffic signal lamp using high-power LEDs as light sources. Background technique [0002] The light source of the current traffic signal lights mainly consists of incandescent lamps or multiple low-power LEDs. The incandescent lamp emits white light, and it needs to pass through the "colored filter" to get the required red, yellow, and green traffic signal lights. The incandescent lamp also needs to add a reflective bowl to increase the energy of the light emitted forward. After "mirror" filtering, the power consumption is large, the brightness is low, and the service life is short. Low-power LED traffic lights, due to the lack of optical treatment, the light of the light-emitting diodes is not fully utilized, the number of LEDs configured is large, the cost is high, and the price is expensive. Due to the large number of LED tubes used, its reliability...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F21S8/00F21V5/04F21V29/00G08G1/095F21Y101/02F21W111/02F21V29/508F21V29/71F21Y115/10
Inventor 金尚忠李晓艳袁琨王动民朱周洪王焱华
Owner CHINA JILIANG UNIV