| Energy Saving |
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| We continue to improve the energy efficiency of our products. Lower consumption of electric power by each individual user adds up to global energy saving. |
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| Why do we need to save power? |
Reduction of CO2 emissions and stop global warming
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Global warming, caused in major part by CO2 discharges, is one of the most serious environmental issues today. Energy consumption in production processes results in emissions of large volumes of CO2. Reduction of such emissions is a key challenge that we must continue to tackle.
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Improvements in the energy efficiency of notebook PCs
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Basically, the notebook PC is more energy efficient than the desktop PC. That said, we must continue to improve its energy efficiency so that we can use it for a longer period of time under the limited battery capacity without any functional degradation.
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| Commitments for Toshiba PC |
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Development of "ACPI" power-saving system
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If the CPU or other devices inside of a PC is set to low power mode, its processing speed slows. If the luminosity of the display is lowered, its operability is affected. Here is where power management becomes necessary. For instance, the power consumption of a device not in use can be kept lower, and the power supply can even be automatically shut off if it is not used for a certain period of time.
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| ACPI |
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This energy-saving function was standardized as "Advanced Configuration and Power Interface" or "ACPI" by three companies: Intel, the CPU development company, Microsoft, which supplies the OS, and Toshiba, which provided knowledge of notebook PCs.
| | Major functions of ACPI |
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ACPI enables the PC to manage power supply to CPU, liquid crystal display, hard disk drive, etc., in a specific fashion through the BIOS or the OS, and can reduce power demands on the battery.
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It also enables the PC to return to operational status quickly from turned-off status. It supports "sleep mode" that allows the user's latest work status to be saved on the hard disk just before the power is turned off. In sleep mode, electric power is not consumed and PC can be re-booted quickly. "ACPI" has become the de facto standard power-saving specification for notebook PCs.
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Additional power saving with Toshiba "Power-saving Utility"
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In order to meet needs for use of PCs on the go, and for efficient power saving without sacrificing necessary functions, power saving in the mobile environment is becoming increasingly important.
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| Power-saving Utility |
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We have developed an original "Power-saving Utility" making the best of the ACPI capabilities for our notebook PCs. The "Power-saving Utility" offers four power saving modes that enable the PC to accurately control CPU processing speed, LCD luminosity, and pausing of hard disk drives and LCD power OFF when not operating, depending on how the PC is used or on how much battery power is left.
| | Major Functions of Power-saving Utility |
- Full Power Mode
Gives priority to performance in the AC power mode
- High Power Mode
Gives priority to processing speed in the battery power mode
- Normal Mode
For normal use
- Long Life Mode
Gives priority to operating time.
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ENERGY STAR Compliant design
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Toshiba provides ENERGY STAR qualified notebook PCs to world wide regions that participate in the ENERGY STAR program.
All products developed 2009 (up to the end of July, 2009) comply with ENERGY STAR Version5.0 except no-OS models.
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