Reflection type liquid crystal display with selective reflector
First Claim
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1. A liquid crystal display device comprising:
- a scattering/transparent liquid crystal cell having a liquid crystal layer for controlling incident light in a scattered or transparent state in accordance with an applied electric field; and
a selective reflector arranged on a side of said liquid crystal layer opposite to a side where observation is performed, and having reflecting characteristics to cause light, which is incident from a direction within a predetermined range of a viewing angle that allows observation of said liquid crystal cell, to reflect in a direction outside the range of the viewing angle on the side where observation is performed;
wherein said selective reflector comprises a light incident surface that forms linear prisms each of which has first and second slants inclined in opposite directions, and a specular reflection layer formed on both of the first and second slants, the light incident surface having light reflecting characteristics that achieve dark black display.
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Abstract
A liquid crystal display device is provided which includes a scattering/transparent liquid crystal cell having a liquid crystal layer for controlling incident light in a scattered or transparent state in accordance with an applied electric field, and a selective reflector arranged on a side of the liquid crystal layer opposite to a side where observation is performed. The reflector has reflecting characteristics to cause light, which has come incident from a direction within a predetermined range of a viewing angle that allows observation of the liquid crystal cell, to reflect in a direction outside the range of the viewing angle on the side where observation is performed.
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Citations
1 Claim
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1. A liquid crystal display device comprising:
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a scattering/transparent liquid crystal cell having a liquid crystal layer for controlling incident light in a scattered or transparent state in accordance with an applied electric field; and
a selective reflector arranged on a side of said liquid crystal layer opposite to a side where observation is performed, and having reflecting characteristics to cause light, which is incident from a direction within a predetermined range of a viewing angle that allows observation of said liquid crystal cell, to reflect in a direction outside the range of the viewing angle on the side where observation is performed;
wherein said selective reflector comprises a light incident surface that forms linear prisms each of which has first and second slants inclined in opposite directions, and a specular reflection layer formed on both of the first and second slants, the light incident surface having light reflecting characteristics that achieve dark black display.
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Specification
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Current AssigneeInterDigital Patent Holdings, Inc. (InterDigital, Inc.)
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Original AssigneeCasio Computer Company Limited
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InventorsOno, Toshiomi, Yoshida, Tetsushi, Kusuno, Tetsuya
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Primary Examiner(s)Parker, Kenneth
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Application NumberUS09/384,010Time in Patent Office1,657 DaysField of Search349/86, 349/113US Class Current349/113CPC Class CodesG02F 1/1334 based on polymer dispersed ...G02F 1/133555 Transflectors
