ASIC-based MCU and the program LED SCR dimming tec

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effectively address these visual problems,business neon sign, through several ways. One. Tunnel tunnel lighting lighting set into the introduction section of the general, adaptation section,display boards, transition section,for sale boards, the basic section and five sections lighting outlet which has a different role in each section: (1) the introduction paragraph: the elimination of "black hole" phenomenon, so the driver can identify the obstacles in the exit of the hole; in the day, for example, assume that the tunnel mouth environment brightness 4000cd/M2, speed of 80KM / H,light signs,
then meet the minimum requirements for the introduction of the length and brightness were 40 meters and 80cd/M2. (2) adaptation section: enter the tunnel, the driver can adapt quickly and eliminate the "black hole" phenomenon; according to the above conditions, to adapt the length and brightness were 40 m and 80 ~ 46cd/M2. (3) TRANSITION: drivers getting used to the tunnel interior lighting; according to the above conditions, the length of transition section and brightness were 40 m and 40 ~ 4.5cd/M2.
(4) basic sections: basic lighting inside the tunnel. (5) Exit: In the daytime, so the driver can gradually adapt to the exit of the light, eliminating the "light hole" phenomenon; at night, so the driver can see the inside and outside the linear path of obstacles in the way to eliminate the exit of the "black hole" phenomenon, the general practice is to use the street as a continuation of light outside the cave.
During the day, the tunnel exit section of the lighting levels with the entrance of the lighting levels, basic lighting inside the tunnel should be higher than the value of high brightness; at night, on the contrary, basic lighting inside the tunnel should be lower than the brightness value, when the tunnel outside the street lighting, the value of the tunnel road surface brightness value of not less than 2 times the brightness of the open.