Design of Low-Glared LED Rear Light of Automotive for EU ECE Regulation by Use of Optimized Micro-Prisms Array

Le, Hien-Thanh; Le, Lanh-Thanh; Liao, Hsing-Yuan; Chen, Ming-Jui; Ma, Hsin-Yi; Lee, Hsiao-Yi

doi:10.3390/cryst10020063

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…(Luce, 2005), a researcher on intelligent rear lights pressured that a concept for an adaptive rear light is predicted to be adopted soon because he thinks the system also offers the possibility to get an automatically operating fog lamp. Research on the Design of Low-Glared LED Rear lights according to European standards conducted by (Le et al, 2020) found that new LED rear light for automobiles is proposed and demonstrated for UN/ECE R07 regulation. The full rear light is an aggregate of a position lamp and a braking lamp, and LED light bars and micro-prisms are worried as their vital components.…”

Section: Literature Reviewmentioning

confidence: 99%

Light Intensity Meter and Rear Position Lamp Height: Addition to Indonesian Road Safety Regulations

T¹,

Aprianto²,

Ridwan³

2022

cset

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Forty-six percent of traffic accidents in Indonesia occur on the toll road, and 86 percent of road accidents are due to human error. The number of accidents on the toll road involving heavy vehicles is 33 percent, with the cause of the accident being hit by a vehicle from behind. This incident was caused by the driver's loss of visual perception of the presence of the vehicle in front of him, namely the driver was unable to estimate its existence with the distance of the vehicle in front, one of the reasons was that the driver did not clearly see the light emitted by the vehicle in front of him. Vehicle inspection to the vehicle class must be tested, necessary to do, which is to find out whether the vehicle is suitable for operation or not. Indonesia has not set rules that limit the light intensity and height of rear-light vehicles. From these problems, research was conducted on the design of measuring devices for measuring light intensity and height of the rear light for road safety regulations in Indonesia. The Research and Development (R&D) method is used in this study. This research is a development of previous research in designing a measuring device. Based on the design, manufacture, and testing results, this device can function according to the program design. The device design has been tested and validated, and it is hoped it can be in government policy and be applied to Vehicle Inspection Stations (UPUBKB) throughout Indonesia.

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Section: Literature Reviewmentioning

confidence: 99%

Light Intensity Meter and Rear Position Lamp Height: Addition to Indonesian Road Safety Regulations

T¹,

Aprianto²,

Ridwan³

2022

cset

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“…However, like other light sources, LEDs alone cannot provide the necessary intensity distribution in all applications. Therefore, LED lights tend to be furnished with secondary lenses to tailor their light to meet the standards for lighting applications [9,10], such as road lighting.…”

Section: Introductionmentioning

confidence: 99%

“…In order to construct a new LED CBL tunnel light, a free surfaced secondary lens was designed and produced to tailor the light of a 50 W white-light LED array. The lens uses the internal reflection and refraction of light to work, which is different from traditional optical LED devices, such as optical reflectors or total internal reflection (TIR) devices [9,18]. Through optical simulation experiments in a trial tunnel in Taiwan, the LED light was demonstrated to be suitable for use as a Counter Beam Light (CBL) and able to meet the CIE 88:2004 regulations for tunnel lighting with appropriate light arrangements [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Design and Prototyping of Efficient LED Counter Beam Light with Free-Formed Surface for Meeting International Tunnel Lighting Standards

Liao¹,

Chen²,

et al. 2021

Energies

Self Cite

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An LED Counter Beam Light (CBL) with a free surface secondary lens is proposed to enhance the safety and efficiency of tunnels. The secondary lens was designed and produced to be mounted on a 50 W white-light LED array to generate the targeted counter beam pattern, in order to meet the standards for enhanced tunnel road lighting of the CIE (Commission Internationale de l’Eclairage)—CIE 88:2004—in a trial tunnel lighting scheme. Through the simulation of a road tunnel in Northern Taiwan using the LiteStar four-dimensional software, it was shown that the proposed LED light can serve as a qualifying CBL to generate an average road tunnel surface luminance (Lav) of 182.76 cd/m2, which is better than the 138 cd/m2 that commercial High-Pressure Sodium (HPS) tunnel lights can provide and the 181 cd/m2 minimum stipulated in the CIE 88:2004 regulations. The results also show that the proposed LED light accomplishes a contrast revealing coefficient qc of 1.03, which is above the minimum regulatory level of 0.6 for a qualified CBL, as well as a luminance uniformity Uo of 0.89 (regulatory minimum, 0.4), longitudinal luminance uniformity UL of 0.99 (regulatory minimum, 0.6), and glare factor TI (threshold increment) of 7.24% (regulatory minimum, 15%). In order to test the feasibility of the LED CBL for future commercialization, the proposed LED CBL was prototyped and measured; the results demonstrate that an average road surface luminance (Lav) of 184.5 cd/m2, intensity of the luminance uniformity Uo of 0.7, intensity of the longitudinal luminance uniformity UL of 0.94, glare factor of 7.04%, and contrast revealing coefficient qc of 1.38 can be achieved, which are all above the levels required by the CIE 88:2004 regulations.

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“…In the twelfth paper, Le et al [12] propose a design of a low-glare LED rear light of an automobile for United Nations Economic Commission for Europe (ECE) regulations by using optimized micro-prisms array. The full rear light is a combination of a position lamp and a braking lamp, and LED light bars and micro-prisms are involved as their essential components.…”

mentioning

confidence: 99%

Advanced LED Solid-State Lighting Optics

Sun

Nguyen

2020

Crystals

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Light-emitting diodes (LEDs) have been intensively studied for white-light lighting since their luminous efficacy exceeds 50 lm/W. Currently, the luminous efficacy of an LED light tube/bulb is almost above 100 lm/W. LED solid-state lighting (SSL) has unequivocally become the major light source in general lighting. The fact of high efficiency and other advantages of LED SSL is enough to penetrate all lighting scenarios. However, what people demand from new-generation lighting is not only in energy efficiency but also in lighting quality. Thus, how to make the lighting more user friendly is one of the important issues, and, here, optics is the key point. For making a collection with the discussions of the novel optical design in enhancing lighting efficiency in a more uniform illumination pattern, in higher sharpness for special lighting, in a higher signal-to-noise ratio for communication, in more functions for new applications, etc., this Special Issue of “Advanced LED Solid-State Lighting Optics” focuses on advanced applications in all aspects.

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Design of Low-Glared LED Rear Light of Automotive for EU ECE Regulation by Use of Optimized Micro-Prisms Array

Cited by 5 publications

References 17 publications

Light Intensity Meter and Rear Position Lamp Height: Addition to Indonesian Road Safety Regulations

Light Intensity Meter and Rear Position Lamp Height: Addition to Indonesian Road Safety Regulations

Design and Prototyping of Efficient LED Counter Beam Light with Free-Formed Surface for Meeting International Tunnel Lighting Standards

Advanced LED Solid-State Lighting Optics

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