Liquid crystal display device viewable from both surfaces and portable apparatus using same

surface display technology, applied in the direction of mirrors, devices with multiple display units, identification means, etc., can solve the problems of high cost of using two liquid crystal display elements as described above, limited mounting space for a liquid crystal display device, and inability to use liquid crystal display devices in portable apparatuses. to achieve the effect of reducing the occupation area
US20060012736A1Inactive Publication Date: 2006-01-19CASIO COMPUTER CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
CASIO COMPUTER CO LTD
Publication Date
2006-01-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

In front of a liquid crystal display element (1), a surface light source (25) is arranged which emits a light toward the liquid crystal display element (1) and lets lights coming from its front and its back permeate therethrough. The liquid crystal display element (1) has reflection / permeation means (10) which is provided behind a liquid crystal cell (2) and a liquid crystal layer (5), and which reflects a part of a light that comes to each of a plurality of pixels (80) from the front of the liquid crystal cell (2), and lets the other part of the light permeate the reflection / permeation means (10).
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Description

TECHNICAL FIELD

[0001] The present invention relates to a both surface display type liquid crystal display device and a portable apparatus having a both surface display function. BACKGROUND ART

[0002] As disclosed in Unexamined Japanese Patent Application KOKAI Publication No. H10-90678 and Unexamined Japanese Patent Application KOKAI Publication No. 2001-290445, a liquid crystal display device in which two liquid crystal display elements are disposed back to back with their display surfaces facing the opposite directions from each other, and a surface light source for emitting a light toward both the liquid crystal display elements is disposed between them, is known as a both surface display type liquid crystal display device to be used in a portable apparatus such as a portable phone, which has a display function on both surfaces of its case.

[0003] However, using two liquid crystal display elements as described above costs high, and both surface display with the use of one liquid...

Claims

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