Three dimensional image projector stabilization circuit
First Claim
1. A projector system for a portable electronic device, the projector system comprising:
- an input device;
a digital mirror device (DMD), the DMD having a plurality of rotating minors;
a sensor operably coupled to measure a rotational speed of the plurality of rotating mirrors;
a control device configured for controlling the rotational speed of the plurality of rotating mirrors;
a phase locked loop (PLL) electrically coupled to the sensor; and
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 sensor, for comparing the phase reference signal and the phase feedback signal to determine whether the input device and the DMD are synchronized, and for sending a first signal to the control device to change the rotational speed of the plurality of minors in response to determining that the input device and DMD are not synchronized.
1 Assignment
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Accused Products
Abstract
A method for providing a feedback circuit for a three dimensional projector. First and second input devices and a sensor for determining the rotational speed of the second input device are provided. A control device for controlling the rotational speed of the second input device and a phase locked loop (PLL) are provided. A phase reference signal is created based on the signal rate of the first input device. A phase signal is created based on the rotational speed of the second input device. 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
20 Claims
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1. A projector system for a portable electronic device, the projector system comprising:
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an input device; a digital mirror device (DMD), the DMD having a plurality of rotating minors; a sensor operably coupled to measure a rotational speed of the plurality of rotating mirrors; a control device configured for controlling the rotational speed of the plurality of rotating mirrors; a phase locked loop (PLL) electrically coupled to the sensor; and 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 sensor, for comparing the phase reference signal and the phase feedback signal to determine whether the input device and the DMD are synchronized, and for sending a first signal to the control device to change the rotational speed of the plurality of minors in response to determining that the input device and DMD are not synchronized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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 sensor operably coupled to measure a rotational speed of the PBS; a control device configured for controlling a rotational speed of the plurality of minors; a phase locked loop (PLL) electrically coupled to the sensor; and 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 sensor, 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 (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification