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US Patent 7834834 Display device, viewing angle control device, and electronic apparatus

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Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7834834
Date of Patent
November 16, 2010
Patent Application Number
11574609
Date Filed
September 1, 2005
Patent Citations Received
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US Patent 12117621 Control of reflections of a display device
0
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US Patent 11977286 Observer-tracked privacy display
0
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US Patent 12013603 Pupillated illumination apparatus
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US Patent 12066717 Optical stack for switchable directional display
0
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US Patent 11668963 Directional display apparatus
0
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US Patent 11747693 Optical stack for switchable directional display
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US Patent 11874541 Directional display apparatus
0
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US Patent 11874576 Optical stack for privacy display
0
...
Patent Primary Examiner
‌
Bipin Shalwala
Patent abstract

A portable phone has a main LCD and a SW-LCD, provided on a path of light to be transmitted by the main LCD, which electrically switches between (i) an image to be seen in a single image display mode and (ii) an image to be seen in a multiple image display mode. In the multiple image display mode, the display switch makes it possible that (a) the image displayed by the image display is seen from a front direction and (b) an image obtained by superimposing, onto the image displayed by the image display, a switching image formed by the display switch is seen from an oblique direction. The switching image is formed by providing, with at least one of a pair of transparent electrode films for applying a voltage to a liquid crystal layer, a patterning having an area larger than 50% of an area of a display screen.

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