Automatic detection method for backlight control and portable electronic device using the same
First Claim
1. An automatic detection method, adapted to control backlight brightness of a portable electronic device, the portable electronic device comprising an ambient light sensor and a proximity sensor, the automatic detection method comprising:
- activating the ambient light sensor to detect ambient light periodically with a fixed time period;
activating the proximity sensor to detect an object when intensity detected by the ambient light sensor decreases to be lower than a predetermined value to identify whether the decreasing of the intensity is caused by the object blocking the ambient light or by weakening of the ambient light;
maintaining the backlight brightness when the proximity sensor detects the object due to that the decreasing of the intensity is caused by the object blocking the ambient light; and
reducing the backlight brightness when the proximity sensor does not detect the object due to that the decreasing of the intensity is caused by the weakening of the ambient light;
wherein when an incoming call on the portable electronic device is detected, the method further comprises;
activating the ambient light sensor and the proximity sensor simultaneously;
setting the backlight brightness to zero when the proximity sensor detects the object; and
adjusting the backlight brightness according to the ambient light detected by the ambient light sensor when the proximity sensor does not detect the object; and
wherein when the incoming call is detected and the proximity sensor detects the object, the method further comprises;
detecting another incoming call when the proximity sensor detects that the object has left; and
setting the backlight brightness to zero continuously when the proximity sensor detects that the object has not left.
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Accused Products
Abstract
There is provided a portable electronic device including a backlight module, an ambient light sensor, a proximity sensor and a processing unit. The backlight module illuminates with backlight brightness. The ambient light sensor is configured to detect ambient light intensity. The proximity sensor is configured to detect an object. The processing unit is configured to activate the proximity sensor when the ambient light intensity detected by the ambient light sensor is lower than a predetermined value or decreases more than a predetermined range, and to maintain or reduce the backlight brightness according to a detection result of the proximity sensor. There is further provided an automatic detection method.
8 Citations
16 Claims
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1. An automatic detection method, adapted to control backlight brightness of a portable electronic device, the portable electronic device comprising an ambient light sensor and a proximity sensor, the automatic detection method comprising:
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activating the ambient light sensor to detect ambient light periodically with a fixed time period; activating the proximity sensor to detect an object when intensity detected by the ambient light sensor decreases to be lower than a predetermined value to identify whether the decreasing of the intensity is caused by the object blocking the ambient light or by weakening of the ambient light; maintaining the backlight brightness when the proximity sensor detects the object due to that the decreasing of the intensity is caused by the object blocking the ambient light; and reducing the backlight brightness when the proximity sensor does not detect the object due to that the decreasing of the intensity is caused by the weakening of the ambient light; wherein when an incoming call on the portable electronic device is detected, the method further comprises; activating the ambient light sensor and the proximity sensor simultaneously; setting the backlight brightness to zero when the proximity sensor detects the object; and adjusting the backlight brightness according to the ambient light detected by the ambient light sensor when the proximity sensor does not detect the object; and wherein when the incoming call is detected and the proximity sensor detects the object, the method further comprises; detecting another incoming call when the proximity sensor detects that the object has left; and setting the backlight brightness to zero continuously when the proximity sensor detects that the object has not left. - View Dependent Claims (2, 3, 4)
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5. An automatic detection method, adapted to control backlight brightness of a cell phone, the cell phone comprising an ambient light sensor and a proximity sensor, the automatic detection method comprising:
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detecting an incoming phone call; activating the ambient light sensor to detect an intensity value of ambient light and executing following steps when the incoming phone call is not detected; activating the proximity sensor to detect an object when the intensity value decreases to be lower than a predetermined value to identify whether the decreasing of the intensity value is caused by the object blocking the ambient light or by weakening of the ambient light; maintaining the backlight brightness when the proximity sensor detects the object due to that the decreasing of the intensity value is caused by the object blocking the ambient light; and reducing the backlight brightness when the proximity sensor does not detect the object due to that the decreasing of the intensity value is caused by the weakening of the ambient light; and activating the ambient light sensor and the proximity sensor simultaneously and executing following steps when the incoming phone call is detected; setting the backlight brightness to zero when the proximity sensor detects the object; and adjusting the backlight brightness according to the ambient light detected by the ambient light sensor when the proximity sensor does not detect the object; wherein when the incoming phone call is detected and the proximity sensor detects the object, the method further comprises; detecting another incoming phone call when the proximity sensor detects that the object has left; and setting the backlight brightness to zero continuously when the proximity sensor detects that the object has not left. - View Dependent Claims (6, 7, 8)
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9. A portable electronic device, comprising:
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a backlight module configured to illuminate with backlight brightness; an ambient light sensor configured to detect ambient light intensity; a proximity sensor configured to detect an object; and a processing unit configured to activate the ambient light sensor to detect the ambient light intensity, without yet activating the proximity sensor, activate the proximity sensor to detect the object when the ambient light intensity detected by the ambient light sensor decreases to be lower than a predetermined value to identify whether the decreasing of the ambient light intensity is caused by the object blocking ambient light or by weakening of the ambient light, and maintain or reduce the backlight brightness according to a detection result of the proximity sensor, wherein when the proximity sensor detects the object, the processing unit is configured to identify that the decreasing of the ambient light intensity is caused by the object blocking the ambient light but not by the weakening of the ambient light and control the backlight module to maintain the backlight brightness; wherein when an incoming call on the portable electronic device is detected, the processing unit further processing activating the ambient light sensor and the proximity sensor simultaneously, setting the backlight brightness to zero when the proximity sensor detects the object, and adjusting the backlight brightness according to the ambient light detected by the ambient light sensor when the proximity sensor does not detect the object; and wherein when the incoming call is detected and the proximity sensor detects the object, the processing unit further processing detecting another incoming call when the proximity sensor detects that the object has left, and setting the backlight brightness to zero continuously when the proximity sensor detects that the object has not left. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification