Title :
Digital LED desk lamp with automatic uniform illumination area by using two accelerometers and halftone method
Author :
Chi-Huang Hung ; Ying-Wen Bai ; Jung-Ming Hsu ; Po-Wen Chen ; Hsu-Yao Wu
Abstract :
In this paper, we design a digital LED desk lamp that can adjust the LEDs brightness in the LED array to obtain the uniform illuminated area whenever the user rotates the lamp shade. The system contains three parts: the LED light source, the tilted measurement unit and the control unit. When the user adjusts the position of the lamp shade the system can change the halftone pattern by using the angle difference from the measurement of the two accelerometers to produce a uniform illuminated area.
Keywords :
LED lamps; accelerometers; light sources; LED array; LED brightness; LED light source; accelerometers; angle difference; automatic uniform illumination area; control unit; digital LED desk lamp; halftone method; halftone pattern; lamp shade position adjustment; tilted measurement unit; Accelerometers; Brightness; LED lamps; Light sources; Power demand;
Conference_Titel :
Consumer Electronics (ISCE 2014), The 18th IEEE International Symposium on
Conference_Location :
JeJu Island
DOI :
10.1109/ISCE.2014.6884285
