(12) (10) Patent N0.: US 7,538,496 B2 Ryu (45) Date of Patent: May 26, 2009 (54) DISPLAY APPARATUS 7,019,728 B2 * 3/2006 Lee et al. .................... .. 345/98 7,196,679 B2 * 3/2007 Jang et al. 345/60 Inventor: KWang_ch00n Ryu’ SuWOn_Si * TSl1g3.W3. . . . . .. 2003/0169604 A1* 9/2003 Min ............ .. 363/25 (73) Assigneez samsung Electronics C0” Ltd” 2004/0012987 A1 : 1/2004 Hachrsuka et al. 363/95 SuWOn_si (KR) 2005/0087671 A1 4/2005 Park ....... .. 250/205 2005/0151424 A1* 7/2005 Hrrosue ...... .. 307/11 (,,) Notice: Subject to any disclaimer’ the term Ofthis 2006/0284577 A1* 12/2006 Shin @131. ................. .. 315/360 patent is extended or adjusted under 35 FQREIGN PATENT DQCUMENTS U.S.C. 154(b) by 2 days. EP 1524648 4/2005 (21) Appl. No.1 11/469,593 JP 06'85179 3/1994 KR 1993-22503 10/1993 (22) Filed. seP_ 1, 2006 KR 2004-101654 12/2004 (65) Prior Publication Data OTHER PUBLICATIONS
US 2007/0052372 A1 Mar. 8, 2007
(30) Foreign Application Priority Data
Sep. 7, 2005 (KR) .................... .. 10-2005-0083131
(51) Int. Cl.
G09G 3/10 (2006.01)
G09G 3/36 (2006.01)
(52) U.S. Cl. .................. .. 315/169.3; 315/291; 345/102;
345/211
(58) Field of Classification Search ........... .. 315/209 R,
315/224, 291, 307, 169.1~169.3, 225, 226,
315/241 R; 345/87, 2114213, 60, 76; 363/97
See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
5,745,092 A * 4/1998 Ito ............................ .. 345/95
6,239,558 B1* 5/2001 Fujimura et al. .......... .. 315/307
6,476,638 B1 11/2002 Zhou et al.
6,690,591 B2 * 2/2004 Min .......................... .. 363/97
Korean Office Action dated Nov. 1, 2006 issued in KR 2005-83131. * cited by examiner
Primary Examiner—Douglas W Owens
Assistant Examiner—.Iimmy T Vu
(74) Attorney, Agent, or Firm—StanZione & Kim, LLP
A display apparatus including a display panel to display an image and a back light illuminating the display panel, including an inverter to supply a driving power to the back light, a power supply to supply power to the inverter, a microcomputer to output a back light control signal to control an illuminating function of the back light, a controller to output an inverter control signal to the inverter according to a comparative result comparing an inverter power voltage supplied to the inverter with a predetermined reference voltage when the illuminating function of the back light is in a turned-on state based on the back light control signal.
15 Claims, 3 Drawing Sheets
I NVEFITER
LATCH-UP
VOLTAGE
I MAGE SIGNAL
S I GNAL PROCESSOR
