| 摘要 |
A handheld device includes control elements, an illumination element operable to illuminate the control elements, a light sensor that detects an illumination level, and a sensor that detects whether or not the device is being held. When the illumination level is below an ambient light threshold and the device is being held, the illumination element and activates. However, when either the illumination level is not below the ambient light threshold or the handheld electronic device is not being held, the illumination element deactivates and/or does not activate. In some implementations, the sensor includes a capacitance touch switch and/or a resistance touch switch that detects contact with skin, a gyroscope and/or an accelerometer that detects movement of the handheld device, a pressure sensors that detects exertion of pressure on the handheld device, and/or an additional light sensor that detects when a portion of the handheld electronic device is covered. |
