DISPLAY CONTROLLING DEVICE CAPABLE OF DISPLAYING MULTI-WINDOWS AND RELATED METHOD
Inventor: Kun-Nan Cheng, Hsin-Chu (TW)
Assignee: MStar Semiconductor, Inc., ChuPei,
Hsin-Chu Hsien (TW)
Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 582 days.
Appl.No.: 10/907,449
Filed: Apr. 1, 2005
Prior Publication Data
US 2005/0219409 Al Oct. 6, 2005
Related U.S. Application Data
Provisional application No. 60/558,570, filed on Apr. 2, 2004.
Int. CI.
H04N 7/01 (2006.01)
H04N 5/445 (2006.01)
H04N 9/74 (2006.01)
U.S. CI 348/448; 348/441; 348/564;
348/584; 348/588
Field of Classification Search 348/441,
348/448, 564, 565, 584, 588 See application file for complete search history.
References Cited
U.S. PATENT DOCUMENTS
5,475,442 A * 12/1995 Matsushita et al 348/554
5,610,661 A * 3/1997 Bhatt 348/446
5,943,097 A * 8/1999 Horii 348/441
6,268,887 Bl * 7/2001 Watanabe et al 348/554
6,353,460 Bl* 3/2002 Sokawaetal 348/555
6,373,527 Bl * 4/2002 Lee 348/564
6,384,840 Bl 5/2002 Frank
6,411,333 Bl* 6/2002 Auldetal 348/441
6,421,094 Bl * 7/2002 Han 348/569
6,433,832 B2 * 8/2002 Watanabe et al 348/554
6,556,253 Bl 4/2003 Megied
6,710,817 B2* 3/2004 Oku et al 348/569
6,927,801 B2 * 8/2005 Yugami et al 348/458
7,050,112 B2* 5/2006 Riederetal 348/565
7,142,252 B2* 11/2006 Song 348/565
2005/0206784 Al* 9/2005 Lietal 348/441
FOREIGN PATENT DOCUMENTS
EP 0147542 7/1985
JP 2002258827 9/2002
TW 264548 12/1995
TW 505884 10/2002
TW 200300924 6/2003
* cited by examiner
Primary Examiner—Brian P Yenke
(74) Attorney, Agent, or Firm—Winston Hsu
(57) ABSTRACT
A display controlling device includes a first line buffer, a second line buffer, a buffer controller, a mixer, a de-interlacing device, a de-interlacing controller, a scaling device, a scaling controller, and a window display controller. The window display controller controls the operations of the mixer, the de-interlacing controller, and the scaling controller according to a first coordinate parameter and a second coordinate parameter, wherein a first video frame and a second video frame are displayed on a display device. The window display controller controls the de-interlacing device and the scaling device to selectively operate in either a first clock or a second clock.
9 Claims, 6 Drawing Sheets
