Microprocessor based automatically dimmable eye protection device with interruption prevention
First Claim
1. An auto darkening eye protection device comprising:
- a shutter assembly adjustable between a clear state and a dark state;
a control circuit for controlling the shutter assembly, the control circuitincluding a microcontroller and a driver; and
a protective casing disposed generally about the microcontroller and the driver of the control circuit to substantially prevent electromagnetic fields from interfering with the operation of the control circuit.
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0 Petitions
Accused Products
Abstract
An auto darkening eye protection device comprising a shutter assembly adjustable between a clear state and a dark state and a control circuit. The control circuit is provided with a microcontroller, a delivery circuit, a sensing circuit and a weld detect circuit. The microcontroller is switchable between a sleep mode and a wake-up mode. The delivery circuit outputs a dark state drive signal to the shutter assembly to switch the shutter assembly from the clear state to the dark state upon enablement of the delivery circuit. The sensing circuit senses the occurrence of a welding arc and provides an output indicative of the occurrence of the welding arc. The weld detect circuit receives the output of the sensing circuit. The weld detect circuit enables a dark state drive signal to be delivered to the shutter assembly by the delivery circuit, and a signal to be delivered to the microcontroller to switch the microcontroller from the sleep mode to the wake-up mode whereby the shutter assembly is switched to the dark state without the aid of the microcontroller. The microcontroller can compensate for a startup of the microcontroller which was not caused by user power-up by bypassing at least one of a plurality of initialization and calibration routines for the auto darkening eye protection device. The microcontroller also includes a protective casing disposed generally thereabout to substantially prevent electromagnetic fields from interfering with the operation of the microcontroller.
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Citations
19 Claims
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1. An auto darkening eye protection device comprising:
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a shutter assembly adjustable between a clear state and a dark state; a control circuit for controlling the shutter assembly, the control circuit including a microcontroller and a driver; and a protective casing disposed generally about the microcontroller and the driver of the control circuit to substantially prevent electromagnetic fields from interfering with the operation of the control circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An auto darkening eye protection device comprising:
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a shutter assembly adjustable between a clear state and a dark state; a control circuit for controlling the shutter assembly; and a protective casing supporting the shutter assembly and disposed generally about at least a portion of the control circuit to substantially prevent electromagnetic fields from interfering with the operation of the control circuit, the protective casing comprising a housing having a first surface and a second surface wherein the housing comprises at least one non-conductive material and at least one conductive material disposed on or in the at least one non-conductive material. - View Dependent Claims (14, 15, 16, 17)
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18. An auto darkening eye protection device comprising:
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a shutter assembly adjustable between a clear state and a dark state; a control circuit for controlling the shutter assembly; and a protective casing supporting the shutter assembly and disposed generally about at least a portion of the control circuit to substantially prevent electromagnetic fields from interfering with the operation of the control circuit, the protective casing comprising; a housing made substantially of at least one non-conductive material having a first surface and a second surface; and
at least one conductive material comprising chrome disposed on at least a portion of the first surface of the at least one non-conductive material of the housing.
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19. An auto darkening eye protection device comprising:
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a shutter assembly adjustable between a clear state and a dark state; a control circuit for controlling the shutter assembly; and a protective casing supporting the shutter assembly and disposed generally about at least a portion of the control circuit to substantially prevent electromagnetic fields from interfering with the operation of the control circuit, the protective casing comprising; a housing made substantially of at least one non-conductive material having a first surface and a second surface; and
at least one conductive material comprising copper tape disposed on at least a portion of the second surface of the at least one non-conductive material of the housing.
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Specification