Abstract: A solar cell street lights with a cooling device for streetlight head portion, includes: a vertical pillar fixed to a ground; a hollow mounting rod obliquely connected upward from one side of an upper end portion of the vertical pillar; a lower housing; a mounting hole for mounting a LED module formed on the other side and one end connected to the mounting rod to be communicated with the second hollow portion; and an upper housing mounted on an upper surface portion of the lower housing to form an internal space (A) together with the lower housing and having one end connected to the mounting rod (to be communicated with the second hollow portion, an air outlet for discharging air introduced through the air inlet, and a mounting plate, on which the solar panel is mounted and fixed, formed on an outer surface thereof.

Abstract: A solar cell street lights assembly includes: a vertical pillar fixed to a ground; a hollow mounting rod obliquely connected upward from an upper end portion of the vertical pillar; a lower housing having a first receiving portion; a mounting hole for mounting a LED module formed on the other side; an upper housing mounted on an upper surface portion of the lower housing to form an internal space (A) together with the lower housing and having one end connected to the mounting rod, an outlet for discharging air introduced through the hollow portions, and a solar panel mounted and fixed on an upper surface thereof; a hollow air conduit for introducing external air from a lower portion thereof arranged parallel to the vertical pillar; and at least one air passage pipe having one end connected to the air conduit and passing through the second receiving portion.

Abstract: Provided is a ceiling-type display position adjusting device employing a link structure, and more particularly, to a ceiling-type display position adjusting device which enables a display that is positioned above the ceiling when the display is not watched to descend from the ceiling when the display is watched, and automatically adjusts a watching angle.

Abstract: Provided is a ceiling-protruding type display position adjusting device, and more particularly, to a ceiling-protruding type display position adjusting device that is positioned above the ceiling when a display is not watched, and which descends from the ceiling and even automatically adjusts a watching angle when the display is watched.