IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0505446
(2000-02-16)
|
|
발명자
/ 주소 |
- Johnson, Scott R.
- Canova, Francis J.
- Lunsford, Eric M.
- Twyman, Nicholas
- Osborne, Neal A.
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
Mahamedi, VanHickman Palermo Truong & Becker LLP
|
| 인용정보 |
피인용 횟수 :
37 인용 특허 :
24 |
초록
▼
Methods and apparatus are provided for reserving power in a handheld computer by inducing a sleep mode when the energy supply of the handheld computer reaches a predetermined low level. A software is provided which operates a sleep mode when a device of the handheld computer detects a predetermined
Methods and apparatus are provided for reserving power in a handheld computer by inducing a sleep mode when the energy supply of the handheld computer reaches a predetermined low level. A software is provided which operates a sleep mode when a device of the handheld computer detects a predetermined low battery voltage. A processor operates the software to place the handheld computer in a low energy-consuming shutdown state in which an interrupt controller operates to mask those interrupt signals thus providing an user with the impression that the device has entered an unresponsive sleep mode. In maintaining the sleep mode, the processor operates such that all input signals that request the handheld computer to power up remain active but so long as the battery voltage remains below a predetermined voltage the interrupt signals to power up selected applications and devices are masked. A method for returning the handheld computer to its normal operational mode once the energy supply has been replenished, is also provided.
대표청구항
▼
Methods and apparatus are provided for reserving power in a handheld computer by inducing a sleep mode when the energy supply of the handheld computer reaches a predetermined low level. A software is provided which operates a sleep mode when a device of the handheld computer detects a predetermined
Methods and apparatus are provided for reserving power in a handheld computer by inducing a sleep mode when the energy supply of the handheld computer reaches a predetermined low level. A software is provided which operates a sleep mode when a device of the handheld computer detects a predetermined low battery voltage. A processor operates the software to place the handheld computer in a low energy-consuming shutdown state in which an interrupt controller operates to mask those interrupt signals thus providing an user with the impression that the device has entered an unresponsive sleep mode. In maintaining the sleep mode, the processor operates such that all input signals that request the handheld computer to power up remain active but so long as the battery voltage remains below a predetermined voltage the interrupt signals to power up selected applications and devices are masked. A method for returning the handheld computer to its normal operational mode once the energy supply has been replenished, is also provided. Blending, Nov. 12, 1999, www.nvidia.com. Technical Presentation: Hardware Transform and Lighting, Nov. 12, 1999, www.nvidia.com. Technical Presentation: GeForce 256 Overview, Nov. 12, 1999, www.nvidia.com. Technical Presentation: DirectX 7 and Texture Management, Nov. 12, 1999 www.nvidia.com. Technical Presentation: Dot Product Lighting, Nov. 12, 1999, www.nvidia.com. Technical Presentation: Texture Coordinate Generation, Nov. 3, 1999, www.nvidia.com. Technical Presentation: Phong Shading and Lightmaps, Nov. 3, 1999, www.nvidia.com. Technical Presentation: The ARB_multitexture Extension, Nov. 3, 1999 www.nvidia.com. Technical Presentation: Multitexture Combiners, Nov. 3, 1999, www.nvidia.com. Technical Presentation: Emboss Bump Mapping, Nov. 3, 1999, www.nvidia.com. Technical Presentation: Hardware Accelerated Anisotropic Lighting, Nov. 3, 1999 www.nvidia.com. Technical Presentation: Guard Band Clipping, Nov. 3, 1999, www.nvidia.com. The RenderMan Interface, Stephan R. Keith, Version 3.1, Pixar Animation Studios, Sep. 1989. The RenderMan Interface, Version 3.2, Pixar Animation Studios, Jul. 2000, www.pixar.com. NVIDIA Product Overview, "GeForce2Ultra", NVIDIA Corporation, Aug. 21, 2000, www.nvidia.com. Duke, "Dreamcast Technical Specs", Sega Dreamcast Review, Sega, Feb. 1999, www.game-revolution.com. Marlin Rowley, "GeForce 1 & 2 GPU Speed Tests", May 11, 2000, www.g256.com. "Dreamcast: The Full Story", Next Generation, Sep. 1998. DirectX 7.0 Programmer's Reference, Microsoft Corporation, 1995-1999 (as part of the DirctX 7.0 SDK on the Companion CD included with "Inside Direct3D", Microsoft Programming Series,
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