The present invention relates to a power supply for an LCD panel display, and more particularly, to an integrated LCD panel power supply that utilizes a single printed circuit board (PCB) for all of the power function of the LCD panel, and a single clock generator for synchronizing all the power functions of an LCD panel.
In one aspect, the present invention provides an LCD panel power supply, comprising a single printed circuit board comprising at least one DC/AC control unit, at least one DC/DC buck converter unit and at least one DC/DC boost control unit. Each unit supplies power to an associated function of the LCD panel.
In another aspect, the present invention provides an LCD panel power supply, comprising a single printed circuit board comprising at least one DC/AC control unit, at least one DC/DC buck converter unit and at least one DC/DC boost control unit. Each unit supplies power to an associated function of the LCD panel. The power supply also includes an oscillator circuit generating a clock signal, the clock signal is supplied to each unit thereby synchronizing the operation of each unit.
In yet another aspect, the present invention provides an LCD panel power supply, comprising a single printed circuit board comprising at least one DC/AC control unit, at least one DC/DC buck converter unit and at least one DC/DC boost control unit and LCD gate and source drivers power supply control units. Each unit supplies power to an associated function of the LCD panel.
In still another aspect, the present invention provides an integrated circuit that includes a bias and reference signal generator, an oscillator, at least one DC/AC inverter controller, at least one DC/DC buck regulator controller, a DC/DC boost regulator controller, and a linear regulator for controlling the power for LCD panels.
It will be appreciated by those skilled in the art that although the following Detailed Description will proceed with reference being made to preferred embodiments and methods of use, the present invention is not intended to be limited to these preferred embodiments and methods of use. Rather, the present invention is of broad scope and is intended to be limited as only set forth in the accompanying claims.
Other features and advantages of the present invention will become apparent as the following Detailed Description proceeds, and upon reference to the Drawings, wherein like numerals depict like parts, and wherein:
In the exemplary system 100, IC 102 is used to host the power requirements of the LCD panel. A DC/AC inverter controller 108 is provided as a conventional and/or proprietary inverter system to generate control signals to a switch network 120 to supply power to one or more CCFL lamps 20. The inverter controller can include an inverter controller such as the OZ960, OZ961, OZ970, OZ969A, OZ971, OZ9RR, manufactured by O2Micro International Limited, and/or other inverter controller topologies known in the art, which may comprise full bridge, half bridge, push-pull and/or other switch network topologies known in the art. A first DC/DC buck controller 110 is provided to control a buck switch network (switches Q1 and Q2) in a manner well known in the art to generate a power supply (e.g. 5V) that may be used, for example, by a microprocessor associated with the power supply depicted in
Advantageously, in the present invention, the power supply units that require a clock, e.g., power supply units 108–114, can be synchronized. An oscillator circuit 104 is provided as a clock for each of the controller units 108–114. The oscillator circuit generates a clock pulse to each of the power supply control units 108–114. Additionally, each of the power supply control units 108–118 can be provided with a common bias signal and reference signal, via a bias a reference signal generator circuit 106 commonly tied to the power supply units. Thus, the clock, bias and reference signals can be supplied to various power supply units of the IC 102 without requiring additional wiring between PCBs as depicted in
Thus, it is evident that there has been provided an integrated power supply system for an LCD panel display. There is also provided an integrated power supply system for an LCD panel display that can be implemented on a single PCB. Those skilled in the art will recognize numerous modifications to the present invention. For example, the IC 102 of
Number | Name | Date | Kind |
---|---|---|---|
4461980 | Nilssen | Jul 1984 | A |
4535399 | Szepesi | Aug 1985 | A |
4541041 | Park et al. | Sep 1985 | A |
4672528 | Park et al. | Jun 1987 | A |
4727469 | Kammiller | Feb 1988 | A |
4763239 | Ball | Aug 1988 | A |
4794506 | Hino et al. | Dec 1988 | A |
4814962 | Magalhaes et al. | Mar 1989 | A |
4833584 | Divan | May 1989 | A |
4855888 | Henze et al. | Aug 1989 | A |
4860189 | Hitchcock | Aug 1989 | A |
4864483 | Divan | Sep 1989 | A |
4912622 | Steigerwald et al. | Mar 1990 | A |
4935857 | Nguyen et al. | Jun 1990 | A |
4952849 | Fellows et al. | Aug 1990 | A |
4953068 | Henze | Aug 1990 | A |
4992919 | Lee et al. | Feb 1991 | A |
5012058 | Smith | Apr 1991 | A |
5017800 | Divan | May 1991 | A |
5027263 | Harada et al. | Jun 1991 | A |
5027264 | DeDoncker et al. | Jun 1991 | A |
5105127 | Lavaud et al. | Apr 1992 | A |
5113334 | Tuson et al. | May 1992 | A |
5132888 | Lo et al. | Jul 1992 | A |
5132889 | Hitchcock et al. | Jul 1992 | A |
5157592 | Walters | Oct 1992 | A |
5198969 | Redl et al. | Mar 1993 | A |
5208740 | Ehsani | May 1993 | A |
5231563 | Jitaru | Jul 1993 | A |
5235501 | Stuart et al. | Aug 1993 | A |
5268830 | Loftus, Jr. | Dec 1993 | A |
5285372 | Huynh et al. | Feb 1994 | A |
5291382 | Cohen | Mar 1994 | A |
5305191 | Loftus, Jr. | Apr 1994 | A |
5363020 | Chen et al. | Nov 1994 | A |
5384516 | Kawabata et al. | Jan 1995 | A |
5402329 | Wittenbreder, Jr. | Mar 1995 | A |
5412557 | Lauw | May 1995 | A |
5418703 | Hitchcock et al. | May 1995 | A |
5420779 | Payne | May 1995 | A |
5422546 | Nilssen | Jun 1995 | A |
5430632 | Meszlenyi | Jul 1995 | A |
5430641 | Kates | Jul 1995 | A |
5448155 | Jutras | Sep 1995 | A |
5448467 | Ferreira | Sep 1995 | A |
5481160 | Nilssen | Jan 1996 | A |
5510974 | Gu et al. | Apr 1996 | A |
5514921 | Steigerwald | May 1996 | A |
5532718 | Ishimaru | Jul 1996 | A |
5546300 | Lee et al. | Aug 1996 | A |
5559688 | Pringle | Sep 1996 | A |
5615093 | Nalbant | Mar 1997 | A |
5619402 | Liu | Apr 1997 | A |
5638260 | Bees | Jun 1997 | A |
5646836 | Sadarnac et al. | Jul 1997 | A |
5669238 | Devers | Sep 1997 | A |
5684683 | Divan et al. | Nov 1997 | A |
5694007 | Chen | Dec 1997 | A |
5712533 | Corti | Jan 1998 | A |
5715155 | Shahani et al. | Feb 1998 | A |
5719474 | Vitello | Feb 1998 | A |
5719759 | Wagner et al. | Feb 1998 | A |
5731652 | Shimada | Mar 1998 | A |
5736842 | Jovanovic | Apr 1998 | A |
5742495 | Barone | Apr 1998 | A |
5742496 | Tsutsumi | Apr 1998 | A |
5744915 | Nilssen | Apr 1998 | A |
5748457 | Poon et al. | May 1998 | A |
5764494 | Schutten et al. | Jun 1998 | A |
5774346 | Poon et al. | Jun 1998 | A |
5781418 | Chang et al. | Jul 1998 | A |
5781419 | Kutkut et al. | Jul 1998 | A |
5784266 | Chen | Jul 1998 | A |
5796598 | Nowak et al. | Aug 1998 | A |
5818172 | Lee | Oct 1998 | A |
5834889 | Ge | Nov 1998 | A |
5844540 | Terasaki | Dec 1998 | A |
5854617 | Lee et al. | Dec 1998 | A |
5856916 | Bonnet | Jan 1999 | A |
5875103 | Bhagwat et al. | Feb 1999 | A |
5880940 | Poon | Mar 1999 | A |
5886477 | Honbo et al. | Mar 1999 | A |
5886884 | Baek et al. | Mar 1999 | A |
5894412 | Faulk | Apr 1999 | A |
5910709 | Stevanovic et al. | Jun 1999 | A |
5917722 | Singh | Jun 1999 | A |
5923129 | Henry | Jul 1999 | A |
5930121 | Henry | Jul 1999 | A |
5932976 | Maheshwari et al. | Aug 1999 | A |
5939830 | Praiswater | Aug 1999 | A |
5946200 | Kim et al. | Aug 1999 | A |
6011360 | Gradzki et al. | Jan 2000 | A |
6051940 | Arun | Apr 2000 | A |
6114814 | Shannon et al. | Sep 2000 | A |
6151232 | Furuhashi et al. | Nov 2000 | A |
6259615 | Lin | Jul 2001 | B1 |
6396722 | Lin | May 2002 | B1 |
6501234 | Lin et al. | Dec 2002 | B1 |
6545862 | Gettemy et al. | Apr 2003 | B1 |
6559606 | Chou et al. | May 2003 | B1 |
Number | Date | Country | |
---|---|---|---|
20040189095 A1 | Sep 2004 | US |