Road indication device

Abstract

A road indication device is provided. The road-guidance indicating device has a light projection unit including light control means for controlling a lamp and light emitted from the lamp. The light projection unit project a light whose peak luminosity is 30000 cd or more, i.e., the light has a luminosity equal to or larger than a peak luminosity of a headlight of a car running on the road. Since a light pillar of light having a high light output and a thick light pillar is projected from the light projection unit, the visuality of the light pillar is improved even in the bad weather and the boundary between the driveway and the shoulder on the road can be affirmatively guided and indicated.

Description

technical field [0001] The present invention relates to a road guidance display device that guides and displays a position on a road, etc. with light. Background technique [0002] In the conventional technology, street lamps for normal road lighting are lit according to the surrounding brightness and illuminate a certain range of the road. Light curtains for snow that is falling, sometimes have a disabling glare. [0003] Moreover, in snowy areas, etc., sometimes snow covers the boundary between roads and road cliffs, and the boundary cannot be distinguished. Therefore, a so-called arrow-shaped mark is placed downward for guidance and display corresponding to the upper position of the road boundary, so that A driver of a vehicle can drive while confirming the boundary of the road by using the arrow-shaped marks provided at regular intervals along the road. However, in bad weather such as a snowstorm, the recognition of the arrow symbol is reduced, and it cannot play a suf...

AI Technical Summary

Problems solved by technology

[0006] However, at least the inventors of the present invention have not found that the method of using such laser light to provide guidance and display in bad weather such as snowstorms is practical.

According to the study of the present inventors, it is found that when the laser beam is irradiated from the laser irradiation device to the boundary of the road, since the light output of the laser beam is small and the laser beam is thin, sufficient visibility cannot be obtained in bad weather such as a snowstorm, and the laser beam The color of the light is limited, and there is a problem that the freedom of color selection is small, such as that the color with good visibility cannot be selected.

[0007] If you want to use lasers to obtain discernible light even in bad weather, the laser device becomes huge and expensive

So, juxtaposing the arrow symbol on the road is essentially very difficult

[0008] Also, since this laser irradiation device is used outdoors, it may be seen by people

At this time, there is a danger of damage to the eyes due to the laser light

Images