BROKEN SCREEN DETECTOR
First Claim
1. A screen damage detection system for a laser PTV comprisinga conductive trace disposed on the surface of a display screen of the PTV, anda damage detection circuit coupled to the conductive trace and configured to detect discontinuity in the conductive trace due to damage of the screen.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods that facilitate the detection of a broken or damaged screen in a laser PTV due to impact or shock through the measure or monitoring of continuity or resistivity of a conductive trace applied to the screen. In one embodiment, a screen damage detection system comprises a clear conductive trace applied to the display screen preferably in a serpentine configuration. Damage to the screen is detected when the hole or crack in the screen is sufficiently large to open the conductive trace. In another embodiment, a damage detection system comprises a clear resistive film applied to the screen. The resistance is measured in the X and Y axis to detect changes in the resistance of the coating due to a crack or hole in the screen and disable the laser through a laser enable output signal when a change in resistance greater than a predetermined value is detected.
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Citations
18 Claims
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1. A screen damage detection system for a laser PTV comprising
a conductive trace disposed on the surface of a display screen of the PTV, and a damage detection circuit coupled to the conductive trace and configured to detect discontinuity in the conductive trace due to damage of the screen.
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11. A screen damage detection system for a laser PTV comprising
a resistive film disposed on a surface of a display screen of the PTV, and a damage detection circuit coupled to the resistive film and configured to detect damage to the screen as a function of a change in resistivity of the film. 12. The system of claim 11 wherein the resistive film comprises a thin metallic layer.
Specification