Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Patent
1997-06-12
1998-11-03
Gross, Anita Pellman
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
349 65, 349 70, G02F 11335
Patent
active
058316973
ABSTRACT:
A flat panel display screen apparatus with optical junction and removable backlighting assembly. An optical junction is formed between a permanently housed light source within a display assembly and a removable light pipe when inserted into the display assembly. The optical junction is formed from a reflective film attached along the long axis of the light source and extends past a side of the light source to cover a gap between the light source and the light pipe. Another reflective strip is placed along and extends past an edge of the light pipe to bridge the gap. The reflective material is used to reflect stray light into the light pipe. The present invention also includes a display subsystem with a light pipe in a removable door, the removable door assembly adapted for insertion into and removal from the display assembly and comprising a light pipe for optically coupling with the light source for illuminating the flat panel display matrix with the back-light and wherein the light source remains secured within the display assembly upon removal of the removable door assembly so that a power supply line to the light source is not disturbed upon removal of the removable door assembly and further comprising a control circuit responsive to the sensor for turning the light source on when the control signal is at a first state and for turning the light source off when the control signal is at a second state.
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Evanicky Daniel E.
Keely Leroy Bertrand
Siefert Steven
Chowdhury Tarifur R.
Gross Anita Pellman
Silicon Graphics Inc.
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