Interactive display system
OwnerMartinus Van Delden, Andrea Giraldo +1inventors
InventorsMartinus Van Delden, Andrea Giraldo, Hjalmar Huitema
Life of this patent
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Abstract
TFTs (10) within a display device (1) are intentionally made sensitive to radiation from an external light source (12), for example by making a pin-hole (34) in the socalled black-matrix layer (33). The voltage across the pixel (8) or sensing this voltage drop just before refreshing the pixel content during 5 the next refresh cycle, it is possible to distinguish between an intentionally illuminated pixel (8) or pixel patterns (37, 38) and a non-illuminated pixel (8).
Claims11
An interactive display system comprising at least one display device with a multiple of picture elements and having means for applying driving voltages to said picture elements via thin film transistors, the interactive display system further comprising input means being able to provide electromagnetic radiation, the display device comprising layer patterns which selectively pass said electromagnetic radiation to a semiconductor layer of a thin film transistor.
A display device with a multiple of picture elements and having means for applying driving voltages to said picture elements via thin film transistors, the display device comprising layer patterns which selectively pass electromagnetic radiation to a semiconductor layer of a thin film transistors.
Input means according to claim 12 having encryption features.
Dependencies are inferred from the claim text.