Optical projection system and energy control method therefor using selection unit
First Claim
1. An optical projection system, comprising:
- a light source module capable of emitting at least one light beam;
an optical engine for receiving the light beam and modulating the light beam according to at least one image signal to form an image beam;
a thermoelectric generator for absorbing heat in the optical projection system and converting the heat into electrical energy;
a storage unit for storing the electrical energy, wherein a state of charge of the storage unit is allowed to reach at least a first level or a second level, and the second level is larger than the first level;
a first electronic device and a second electronic device for receiving the electrical energy stored in the storage unit, wherein the first electronic device has a first threshold voltage, the second electronic device has a second threshold voltage, the first threshold voltage is a minimum voltage required to make the first electronic device operable, the second threshold voltage is a minimum voltage required to make the second electronic device operable, and the second threshold voltage is larger than the first threshold voltage; and
a selection unit, wherein the selection unit outputs a first selection signal to the storage unit to turn on the first electronic device having the first threshold voltage when the state of charge of the storage unit reaches the first level and turn on the second electronic device having the second threshold voltage when the state of charge of the storage unit reaches the second level, and the selection unit outputs a second selection signal to the storage unit to selectively shut down at least one of the first electronic device and the second electronic device according to (1) the state of charge of the storage unit and (2) the first threshold voltage of the first electronic device and the second threshold voltage of the second electronic device, wherein the second electronic device with the second threshold voltage is set by the selection unit to have higher priority to be shut down over the first electronic device with the first threshold voltage when the first electronic device and the second electronic device are in an operating state simultaneously.
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Accused Products
Abstract
An optical projection system includes a light source module, an optical engine, a thermoelectric generator, a storage unit, a plurality of electronic devices, and a selection unit. The light source module is capable of emitting at least one light beam, and the optical engine receives the light beam and modulates the light beam according to at least one image signal to form an image beam. The thermoelectric generator absorbs heat in the optical projection system and converts the heat into electrical energy, and the storage unit stores the electrical energy. The electronic devices receive the electrical energy stored in the storage unit and have at least two different threshold voltages. The selection unit selectively turns on at least one of electronic devices according to a state of charge of the storage unit.
28 Citations
16 Claims
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1. An optical projection system, comprising:
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a light source module capable of emitting at least one light beam; an optical engine for receiving the light beam and modulating the light beam according to at least one image signal to form an image beam; a thermoelectric generator for absorbing heat in the optical projection system and converting the heat into electrical energy; a storage unit for storing the electrical energy, wherein a state of charge of the storage unit is allowed to reach at least a first level or a second level, and the second level is larger than the first level; a first electronic device and a second electronic device for receiving the electrical energy stored in the storage unit, wherein the first electronic device has a first threshold voltage, the second electronic device has a second threshold voltage, the first threshold voltage is a minimum voltage required to make the first electronic device operable, the second threshold voltage is a minimum voltage required to make the second electronic device operable, and the second threshold voltage is larger than the first threshold voltage; and a selection unit, wherein the selection unit outputs a first selection signal to the storage unit to turn on the first electronic device having the first threshold voltage when the state of charge of the storage unit reaches the first level and turn on the second electronic device having the second threshold voltage when the state of charge of the storage unit reaches the second level, and the selection unit outputs a second selection signal to the storage unit to selectively shut down at least one of the first electronic device and the second electronic device according to (1) the state of charge of the storage unit and (2) the first threshold voltage of the first electronic device and the second threshold voltage of the second electronic device, wherein the second electronic device with the second threshold voltage is set by the selection unit to have higher priority to be shut down over the first electronic device with the first threshold voltage when the first electronic device and the second electronic device are in an operating state simultaneously. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An energy control method for an optical projection system, the optical projection system comprising a first electronic device and a second electronic device for receiving the electrical energy stored in the storage unit, wherein the first electronic device has a first threshold voltage, the second electronic device has a second threshold voltage, the first threshold voltage is a minimum voltage required to make the first electronic device operable, the second threshold voltage is a minimum voltage required to make the second electronic device operable, the second threshold voltage is larger than the first threshold voltage, and the energy control method comprising the steps of:
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converting heat in the optical projection system into electrical energy and storing the electrical energy in a storage unit, wherein a state of charge of the storage unit is allowed to reach at least a first level or a second level, and the second level is larger than the first level; and turning on the first electronic device having the first threshold voltage when the state of charge of the storage unit reaches the first level, turning on the second electronic device having the second threshold voltage when the state of charge of the storage unit reaches the second level, and selectively shutting down at least one of the first electronic device and the second electronic device according to (1) the state of charge of the storage unit and (2) the first threshold voltage of the first electronic device and the second threshold voltage of the second electronic device, wherein the second electronic device with the second threshold voltage is set by the selection unit to have higher priority to be shut down over the first electronic device with the first threshold voltage when the first electronic device and the second electronic device are in an operating state simultaneously. - View Dependent Claims (13, 14, 15, 16)
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Specification