US 6,646,697 B1Granted

Liquid crystal display

AssigneeCitizen Watch Co., Ltd.

InventorsKanetaka Sekiguchi, Takashi Akiyama, Masafumi Ide, Masami Kikuchi, Yuichi Akiba, Koji Nakagawa, Koichi Hoshino, Takashi Toida

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Abstract

A liquid crystal display device is structured in such a manner that plural of liquid crystal display panels each comprised of a liquid crystal layer provided between a pair of transparent substrates which have electrodes disposed on each facing inner surface, and a reflection-type polarizing film is disposed at least on the top surface of the plural liquid crystal display panel, or between the liquid crystal display panels, or on the lowest surface of the plural liquid crystal display panel. By controlling a reflection state and a transmission state through the reflection-type polarizing film with electric voltage applied on the liquid crystal layer of the liquid crystal display panel, a display which represents the opening and closing of a metallic shutter is made possible.

Claims16

Dependent claims

A liquid crystal display device, wherein

a plurality of liquid crystal display panels, each comprised of a liquid crystal layer provided between a pair of transparent substrates which have electrodes formed on each opposing inner surface, are laminated;
two said liquid crystal display panels being laminated so that at least one of a portion each thereof overlap the other, so that the pair of transparent substrates of each one of said two liquid crystal display panels comprises an inner substrate and an outer substrate;
the inner substrate of one of said two liquid crystal panels is placed facing the inner substrate of the other of said two liquid crystal display panels, and the outer substrate of one of said two liquid crystal panels is placed opposite to the other of said two liquid crystal display panels with respect to the inner substrate of said one of the said two liquid crystal display panels;
and
a reflection-type polarizing film which transmits the light linearly polarized in the direction parallel to a transmission axis thereof, and reflects the light linearly polarized in the direction orthogonal to the transmission axis thereof, is arranged between said two laminated liquid crystal display panels in such a manner that the reflection-type polarizing film is placed between the inner substrates of said two laminated liquid crystal displays, and the reflection-type polarizing film is adhered to the inner substrate of one of said two liquid crystal display panels without gap and a predetermined gap is provided between the reflection-type polarizing film and the inner substrate of the other of said two liquid crystal display panels.

2 more elements

A liquid crystal display device, wherein

two liquid crystal display panels, each comprised of a liquid crystal layer provided between a pair of transparent substrates which have electrodes formed on each opposing inner surface, are laminated to form a laminate;
said two liquid crystal display panels are laminated so that at least one of a portion each thereof overlaps the other, so that the pair of transparent substrates of each one of said two liquid crystal display panels comprises an inner substrate and an outer substrate;
the inner substrate of one of said two liquid crystal panels is placed facing the inner substrate of the other of said two liquid crystal display panels, and the outer substrate of one of said two liquid crystal panels is placed opposite to the other of said two liquid crystal display panels with respect to the inner substrate of said one of the said two liquid crystal display panels;
a first polarizing film is disposed on a top surface of the laminate formed by the laminated two liquid crystal display panels, a second polarizing film is disposed between the two liquid crystal display panels, and a third polarizing film is disposed on a lowest bottom surface of the laminate;
said second polarizing film being a reflection-type polarizing film which transmits the light linearly polarized in the direction parallel to a transmission axis thereof, and reflects the light linearly polarized in the direction orthogonal to the transmission axis thereof, and which is arranged between said two laminated liquid crystal display panels in such a manner that the reflection-type polarizing film is placed between the inner substrates of said two laminated liquid crystal displays, and the reflection-type polarizing film is adhered to the inner substrate of one of said two liquid crystal display panels without gap and a predetermined gap is provided between the reflection-type polarizing film and the inner substrate of the other of said two liquid crystal display panels, and
said liquid crystal display device comprising a light diffusing layer.

3 more elements

A liquid crystal display device, wherein

two liquid crystal display panels, each comprised of a liquid crystal layer provided between a pair of transparent substrates which have electrodes formed on each opposing inner surface, are laminated,
the two liquid crystal display panels are laminated so that at least one of a portion each thereof overlaps the other, so that the pair of transparent substrates of each one of said two liquid crystal display panels comprises an inner substrate and an outer substrate;
the inner substrate of one of said two liquid crystal panels is placed facing the inner substrate of the other of said two liquid crystal display panels, and the outer substrate of one of said two liquid crystal panels is placed opposite to the other of said two liquid crystal display panels with respect to the inner substrate of said one of the said two liquid crystal display panels;
a first polarizing film is disposed on an upper surface of a first liquid crystal display panel which is arranged on the viewer side relative to a second liquid crystal display panel, a second polarizing film is disposed between the first liquid crystal display panel and the second liquid crystal display panel, that is the other liquid crystal display panel, and a third polarizing film is disposed on a bottom surface of the second liquid crystal display panel;
the second polarizing film is a reflection-type polarizing film which transmits the light linearly polarized in the direction parallel to a transmission axis thereof, and reflects the light linearly polarized in the direction orthogonal to the transmission axis thereof, and which is arranged between said two laminated liquid crystal display panels in such a manner that the reflection-type polarizing film is placed between the inner substrates of said two laminated liquid crystal displays, and the reflection type polarizing film is adhered to the inner substrate of one of said two liquid crystal display panels without gap and a predetermined gap is provided between the reflection-type polarizing film and the inner substrate of the other of said two liquid crystal display panels;
the first liquid crystal display panel has a plurality of segment display portions, and when a display shows a high transmission characteristic through said first polarizing film, said second polarizing film, and the first liquid crystal display panel, no voltage is applied to the liquid crystal layer in an area between two said segment display portions of the first liquid crystal display panel, said area defining accordingly a steady section having a constantly high reflection characteristic;
said second liquid crystal display panel has a display pixel consisting of a matrix type electrode structure, in which the display pixel of said second liquid crystal display panel is smaller than said steady section;
and
a font size displayed by the second liquid crystal panel is larger than the steady section of the first liquid crystal display panel.

6 more elements

Dependencies are inferred from the claim text.