Semi-Transmissive Liquid Crystal Display Device and Portable Terminal Device
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Accused Products
Abstract
A liquid crystal display accommodates a reflective portion with a concavo-convex reflecting pixel electrode for reflecting incident light from the display face side, and a transmissive portion with a transmissive pixel electrode for transmitting light output from the backlight. In a wide viewing angle region, luminance of the reflective portion is greater than the transmissive portion. In other angle regions, luminance of the transmissive portion is greater than the reflective portion. In a wide viewing field mode, the reflective portion and transmissive portion both perform normal display. In the narrow viewing field mode, the transmissive portion performs normal display, while the reflective portion performs cancelling data display, thereby rendering unviewable the display content of the transmissive portion from beyond a certain viewing angle. Thus, a semi-transmissive liquid crystal display device and a portable terminal device is switchable between a narrow viewing field mode and a wide viewing field mode.
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Citations
34 Claims
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1-26. -26. (canceled)
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27. A semi-transmissive liquid crystal display device comprising:
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a liquid crystal panel provided with a liquid crystal layer between two substrates having electrodes formed thereon; a backlight for outputting light to the liquid crystal panel; and a controller for controlling a voltage applied to the liquid crystal layer;
whereineach of pixels of the liquid crystal panel individually has a reflective portion for reflecting and displaying light incident from the display screen side, and a transmissive portion for transmitting and displaying light that is output by said backlight; the reflective portion has wide viewing angle characteristics, and the transmissive portion has narrow viewing angle characteristics, and the controller controls, independently for said reflective portion and the transmissive portion, the voltage applied to the liquid crystal layer, and switches a viewing angle between a wide viewing field mode and a narrow viewing field mode by performing control so that, in the wide viewing field mode, the reflective portion performs normal display while the transmissive portion performs normal display, whereas in the narrow viewing field mode the reflective portion performs dark display while the transmissive portion performs normal display. - View Dependent Claims (29, 31, 33)
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28. A semi-transmissive liquid crystal display device comprising:
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a liquid crystal panel provided with a liquid crystal layer between two substrates having electrodes formed thereon; a backlight for outputting light to the liquid crystal panel; and a controller for controlling a voltage applied to the liquid crystal layer;
whereineach of pixels of the liquid crystal panel individually has a reflective portion for reflecting and displaying light incident from the display screen side, and a transmissive portion for transmitting and displaying light that is output by the backlight; the reflective portion has narrow viewing angle characteristics and the transmissive portion has wide viewing angle characteristics, and the controller controls, independently for the reflective portion and the transmissive portion, the voltage applied to the liquid crystal layer, and switches a viewing angle between a wide viewing field mode and a narrow viewing field mode by performing control so that in the wide viewing field mode the reflective portion performs normal display while said transmissive portion performs normal display, whereas in the narrow viewing field mode the reflective portion performs normal display while said transmissive portion performs dark display. - View Dependent Claims (30, 32, 34)
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Specification