Three dimensional image projector stabilization circuit
First Claim
1. A projector system for a portable electronic device, the projector system comprising:
- a first input device;
a second input device;
a control device;
a sensor; and
a phase locked loop (PLL), the projector system configured for;
creating a phase reference signal based on a signal rate of the first input device;
creating a phase feedback signal based on the rotational speed of the second input device as measured by the sensor;
comparing, by the PLL, the phase reference signal and the phase feedback signal to determine whether the light device and the second input device are synchronized;
sending, by the PLL, a signal to the control device, the sending responsive to determining that the first input device and the second input device are not synchronized; and
changing, by the control device, the rotational speed of the second input device resposive to the signal.
1 Assignment
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Accused Products
Abstract
A projector system that includes a first input device, a second input device, a control device, a sensor and a phase locked loop (PLL). A phase reference signal is created based on a signal rate of the first input device. A phase feedback signal is created based on the rotational speed of the second input device as it is measured by the sensor. The PLL compares the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized. A signal is sent to the control device for the second input device to change the rotational speed of the second input device in response to determining that the first input device and the second input device are not synchronized.
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Citations
17 Claims
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1. A projector system for a portable electronic device, the projector system comprising:
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a first input device; a second input device; a control device; a sensor; and a phase locked loop (PLL), the projector system configured for; creating a phase reference signal based on a signal rate of the first input device; creating a phase feedback signal based on the rotational speed of the second input device as measured by the sensor; comparing, by the PLL, the phase reference signal and the phase feedback signal to determine whether the light device and the second input device are synchronized; sending, by the PLL, a signal to the control device, the sending responsive to determining that the first input device and the second input device are not synchronized; and changing, by the control device, the rotational speed of the second input device resposive to the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a first input device; a second input device; a control device in communication with a digital mirror device (DMD) device, the control device configured for controlling a rotational speed of the DMD device; a sensor in communication with the DMD device, the sensor configured for determining the rotational speed of mirrors within the DMD device and for outputting a phase feedback signal based on the rotational speed of the mirrors; a quiescence delay device electrically coupled to receive the phase feedback signal; and a phase locked loop configured for receiving a phase reference signal from a light source, for receiving the phase feedback signal from the quiescence delay device, for comparing the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized, and for sending a first signal to the control device to change the rotational speed of the mirrors responsive to determining that the light source and the DMD device are not synchronized. - View Dependent Claims (11, 12, 13)
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14. A projector system for a portable electronic device, the projector system comprising:
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a first input device; a second input device; a polarizing beam splitter (PBS), the PBS configured to rotate about a first axis;
a tachometer operably coupled to measure a rotational speed of the PBS;
a control device configured for controlling the rotational speed of the PBS;a phase locked loop (PLL) electrically coupled to the tachometer; and a quiescence delay device electrically coupled between the tachometer and the PLL, the quiescence delay device configured to delay the transmission of a phase feedback signal; wherein the phase locked loop is configured for receiving a phase reference signal from the first input device, for receiving the phase feedback signal from the quiescence delay device, for comparing the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized, and for sending a first signal to the control device to change the rotational speed of the PBS in response to determining that the first input device and second input device are not synchronized. - View Dependent Claims (15, 16, 17)
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Specification