US 7,321,199 B2 | ||
Display apparatus and control method thereof | ||
Sang-Hoon Lee, Ulsan (Korea, Republic of); Jeong-Il Kang, Yongin-si (Korea, Republic of); Yung-Jun Park, Yongin-si (Korea, Republic of); and Kyoung-Geun Lee, Suwon-si (Korea, Republic of) | ||
Assigned to Samsung Electronic Co., Ltd., Suwon-Si (Korea, Republic of) | ||
Filed on Jul. 11, 2006, as Appl. No. 11/483,628. | ||
Claims priority of application No. 10-2005-0084611 (KR), filed on Sep. 12, 2005. | ||
Prior Publication US 2007/0057638 A1, Mar. 15, 2007 | ||
Int. Cl. G05F 1/00 (2006.01) |
U.S. Cl. 315—194 [315/224; 315/291; 345/82; 345/204] | 10 Claims |
1. A display apparatus comprising:
a light source;
a plurality of driving power units, which have pulse width modulation (PWM) generators generating a PWM signal, for providing
driving electric powers to the light source; and
a controller for controlling the plurality of the driving power units whereby electric currents of the driving electric powers
provided from the respective driving power units comprise a phase difference;
wherein the phase difference is expressed as 1/f*N, where f corresponds to a frequency of the PWM signal and N corresponds
to the number of the driving power units.
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