Patent ID: 6825828
Filing Date: 2004-11-30
Classification: G02F,G09G

Abstract:
A backlit liquid crystal display monitor comprising:a backlight assembly having opposing top and bottom surfaces, said bottom surface including a plurality of fluorescent bulbs having parallel bulb axes, and two or more inverters to drive said bulbs; a cooling assembly having opposing top and bottom surfaces, the top surface of said cooling assembly mounted on the bottom surface of said backlight assembly to form a backlight chamber defining air space around said bulbs, said cooling assembly including: a light sensor on the top surface of said cooling assembly, said light sensor having a sensor axis that is perpendicular to the bulb axes of said fluorescent bulbs; a temperature sensor; a heat sink on the bottom surface of said cooling assembly; and an air inlet and an air outlet in fluid communication with said closed air space and positioned for causing air to flow across said bulbs; a rear cover assembly placed over the bottom surface of said cooling assembly to define an electronics chamber between said rear cover assembly and the bottom surface of said cooling assembly, the electronics chamber being separate from said backlight chamber, said rear cover assembly including: an exhaust fan in fluid communication with said air outlet generating a first airflow through said backlight chamber; a cover inlet in fluid communication with said air inlet; a filter placed over said cover inlet; and a fan positioned to draw air towards said heat sink in said electronics chamber generating a second airflow separate from said first airflow; and a controller in communication with said sensors, said inverters, and said fans.