Patent ID: 8655412
Filing Date: 2014-02-18
Classification: H04M

Abstract:
1. A mobile communication apparatus, comprising: a first casing including a display unit having a backlight and configured to visibly display information; a second casing having an input unit and connected to the first casing in a manner movable relative to the first casing; a condition detecting unit configured to detect a change in condition of the mobile communication apparatus between a first condition in which the first casing is overlapped with the second casing and a second condition other than the first condition; and a timer configured to measure illumination time of the backlight; a control unit configured to detect whether the mobile communication apparatus is in a standby state, and to control the backlight to illuminate the display unit with a first luminance greater than zero or to illuminate the display unit with a second luminance greater than zero and less than the first luminance, wherein the control unit is configured to control the backlight to illuminate the display unit with the first luminance when the condition detecting unit detects the change in condition of the mobile communication apparatus from the first condition to the second condition and the control unit does not detect the standby state and to then control the backlight to reduce the illumination of the display unit to the second luminance when the timer measures the illumination time of the first luminance and determines that no input is performed at the input unit for a first predetermined time, wherein the unit is further configured to control the backlight to illuminate the display unit with the second luminance when the condition detecting unit detects the change in condition of the mobile communication apparatus from the first condition to the second condition and the control unit detects the standby state and to then control the backlight to turn off when the timer measures the illumination time of the second luminance and determines that no input is performed at the input unit for a second predetermined time, wherein the display unit illuminated by the backlight with the second luminance has a brightness sufficient to make a screen of the display unit visible for confirmation, and wherein the display unit illuminated by the backlight with the first luminance has a brightness sufficient to make a screen of the display unit usable for carrying out an operation of making a telephone call from the mobile communication apparatus, viewing or creating or transmitting an e-mail, or establishing a connecting communication to a network.