Passive display module and system
First Claim
1. A passive display module for use in a display system having a source of illumination and a projection lens comprising:
- a counter electrode,a display electrode area,a liquid filled cell having a transparent top portion and a wall surrounding said display electrode area,a side light guide coextensive with said display electrode area in one dimension, said guide having an inner face forming at least a part of said wall and an outer face for receiving light from an external source, said guide having a reflective upper surface inclined downwardly towards said display electrode area.
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Accused Products
Abstract
A passive display module for use in a display system having a source of illumination and a projection lens includes a liquid filled cell having a transparent top and a wall surrounding a display electrode area. A side light guide, coextensive with the display area, forms or abuts one wall of the cell and directs light from the source onto the display area. The guide has a reflective upper inclined surface for reflecting light onto the display area and for preventing light from the source from escaping directly to the projection lens. A reflective coating is also provided on an outer face of the remaining portion of the cell wall which is inclined inwardly to return escaping light to the system.
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Citations
9 Claims
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1. A passive display module for use in a display system having a source of illumination and a projection lens comprising:
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a counter electrode, a display electrode area, a liquid filled cell having a transparent top portion and a wall surrounding said display electrode area, a side light guide coextensive with said display electrode area in one dimension, said guide having an inner face forming at least a part of said wall and an outer face for receiving light from an external source, said guide having a reflective upper surface inclined downwardly towards said display electrode area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A passive display module including a liquid filled cell, the cell comprising a counter electrode, a display electrode area in the base of the cell in which area information is optically displayed by selective activation of the display electrodes, a wall around said display electrode area and a transparent top to enclose the liquid in said cell, characterised in that said module further comprises a side light guide coextensive with said display electrode area in one dimension and having an inner face forming at least a part of the wall of said cell, an outer face for receiving light from an external source and a reflective upper surface inclined downwardly towards said display electrode area.
Specification