Power saving driving method of mobile telephone
AssigneeNEC Corporation
InventorsHiroshi Tsuchi, Kohei Okamoto, Toshio Watanabe, Yoshikazu Seko, Seiichi Suzuki
Life of this patent
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Abstract
In a mobile phone having a liquid crystal display unit, the entire liquid crystal display unit is displayed in a simple display mode at lest in a non-operating standby mode. In the simple display mode, the entire liquid crystal display unit is driven by reducing the number of gradation levels or by decreasing a liquid crystal driving voltage. By using such a controlling method, the power consumption of the liquid crystal display unit can be reduced in the non-operating standby mode. On the other hand, necessary information such as time and the amount of remaining battery is displayed such that the information can be read.
Claims11
A power-saving driving method for a mobile phone including a liquid crystal display unit which is driven in a detailed display mode with all gradation levels, wherein,
- at least in a non-operating standby mode, the liquid crystal display unit is driven in a simple display mode in which the entire liquid crystal display unit is displayed with a smaller amount of electrical power as compared with the detailed display mode,
- wherein the entire liquid crystal display unit is driven by reducing the number of gradation levels in the simple display mode.
A power-saving driving method for a mobile phone comprising a liquid crystal display unit which is driven in a detailed display mode with all gradation levels, wherein,
- at least in a non-operating standby mode, the liquid crystal display unit is driven in a simple display mode in which the entire liquid crystal display unit is displayed with a smaller amount of electrical power as compared with the detailed display mode,
- wherein the liquid crystal display unit is driven in the simple display mode when the mobile phone touches an ear of the user.
A mobile apparatus including a liquid crystal display unit which is driven in a detailed display mode with all gradation levels, wherein,
- in a simple display mode, the entire liquid crystal display unit is driven with a smaller amount of electrical power as compared with the detailed display mode, and
- the liquid crystal display unit is driven in one of the detailed display mode and the simple display mode,
- wherein the entire liquid crystal display unit is driven by reducing the number of gradation levels in the simple display mode.
A mobile phone comprising a liquid crystal display unit which is driven in a detailed display mode with all gradation levels, wherein,
- in a simple display mode, the entire liquid crystal display unit is driven with a smaller amount of electrical power as compared with the detailed display mode, and
- the liquid crystal display unit is driven in one of the detailed display mode and the simple display mode,
- wherein the liquid crystal display unit is driven in the simple display mode during a phone call.
Dependencies are inferred from the claim text.