| US 7,567,245 B2 | ||
| Information processing device and display brightness control method | ||
| Tohru Mamata, Akiruno (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Mar. 12, 2004, as Appl. No. 10/798,783. | ||
| Claims priority of application No. 2003-067557 (JP), filed on Mar. 13, 2003. | ||
| Prior Publication US 2004/0223007 A1, Nov. 11, 2004 | ||
| Int. Cl. G06F 3/038 (2006.01) | ||
| U.S. Cl. 345—207 [345/102] | 10 Claims |
| 1. An information processing device comprising:
a display unit having changeable display brightness;
a detector configured to detect a lightness of surroundings;
a calculating unit configured to calculate a target display brightness of the display unit based on the surrounding lightness
detected by the detector;
a selector configured to select a first mode when the difference between the target display brightness and the current display
brightness is larger than a predetermined threshold brightness and a second mode when the difference between the target display
brightness and the current display brightness is not larger than the predetermined threshold brightness; and
a brightness control unit configured to supply a brightness control signal for changing a current display brightness to the
display unit when the current display brightness does not equal the target display brightness,
wherein, when the first mode is selected, the brightness control unit supplies a first brightness control signal changing
the current display brightness by a predetermined brightness which is smaller than a difference between the current display
brightness and the target brightness, and
when the second mode is selected, the brightness control unit supplies a second brightness control signal changing the current
display brightness by the difference.
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