LIQUID CRYSTAL DISPLAY DEVICE
First Claim
1. A liquid crystal display device comprising:
- a plurality of light sources emitting a plurality of lights; and
a pixel portion, the pixel portion comprising;
a first pixel electrode having a light-transmitting property; and
a second pixel electrode which is a reflective electrode and placed adjacently to the first pixel electrode,wherein the first pixel electrode is electrically connected to a first transistor and the second pixel electrode is electrically connected to a second transistor,wherein the pixel portion is divided into a plurality of regions,wherein color display is performed by controlling the plurality of lights whose hues are different per the plurality of regions and applying a voltage to a first region of the liquid crystal layer overlapping with the first pixel electrode, andwherein a still image is displayed by driving the second transistor in a period when the plurality of light sources are turned off and applying a voltage to a second region of the liquid crystal layer overlapping with the second pixel electrode.
1 Assignment
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Accused Products
Abstract
An object is to provide a liquid crystal display device capable of image display according to an environment around the liquid crystal display device, e.g., in a bright environment or a dim environment. Another object is to provide a liquid crystal display device capable of displaying an image in both modes of a reflective mode in which external light is used as a light source and a transmissive mode in which a backlight is used. In order to achieve at least one of the above objects, a liquid crystal display device is provided with a region (a reflective region) where display is performed with reflection of incident light through a liquid crystal layer and a region (a transmissive region) where display is performed with transmission of light from a backlight and can switch the transmissive mode and the reflective mode. In the case where a full-color image is displayed, a pixel portion includes at least a first region and a second region, a plurality of lights of different hues are sequentially supplied to the first region according to a first order, and a plurality of lights of different hues are also sequentially supplied to the second region according to a second order which is different from the first order.
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Citations
15 Claims
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1. A liquid crystal display device comprising:
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a plurality of light sources emitting a plurality of lights; and a pixel portion, the pixel portion comprising; a first pixel electrode having a light-transmitting property; and a second pixel electrode which is a reflective electrode and placed adjacently to the first pixel electrode, wherein the first pixel electrode is electrically connected to a first transistor and the second pixel electrode is electrically connected to a second transistor, wherein the pixel portion is divided into a plurality of regions, wherein color display is performed by controlling the plurality of lights whose hues are different per the plurality of regions and applying a voltage to a first region of the liquid crystal layer overlapping with the first pixel electrode, and wherein a still image is displayed by driving the second transistor in a period when the plurality of light sources are turned off and applying a voltage to a second region of the liquid crystal layer overlapping with the second pixel electrode. - View Dependent Claims (2, 3, 4, 5)
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6. A liquid crystal display device comprising:
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a plurality of light sources emitting a plurality of lights whose hues are different from each other; and a pixel portion, the pixel portion comprising; a first pixel electrode having a light-transmitting property; and a second pixel electrode which is a reflective electrode and placed adjacently to the first pixel electrode, wherein the first pixel electrode is electrically connected to a first transistor and the second pixel electrode is electrically connected to a second transistor, wherein the pixel portion comprises a first region and a second region, wherein color display is performed by controlling the plurality of lights whose hues are different per the first region and the second region and applying a voltage to a first region of the liquid crystal layer overlapping with the first pixel electrode, and wherein a still image is displayed by driving the second transistor in a period when the plurality of light sources are turned off and applying a voltage to a second region of the liquid crystal layer overlapping with the second pixel electrode. - View Dependent Claims (7, 8, 9, 10)
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11. A liquid crystal display device comprising:
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a plurality of light sources emitting a plurality of lights whose hues are different from each other; and a pixel portion, the pixel portion comprising; a first pixel electrode having a light-transmitting property; and a second pixel electrode which is a reflective electrode and placed adjacently to the first pixel electrode, wherein the first pixel electrode is electrically connected to a first transistor and the second pixel electrode is electrically connected to a second transistor, wherein the pixel portion comprises a first region and a second region, wherein color display is performed by sequentially supplying the plurality of lights to the first region in a first rotating order and to the second region in a second rotating order and applying a voltage to a first region of the liquid crystal layer overlapping with the first pixel electrode, wherein a still image is displayed by driving the second transistor in a period when the plurality of light sources are turned off and applying a voltage to a second region of the liquid crystal layer overlapping with the second pixel electrode, and wherein the first rotating order is different from the second rotating order. - View Dependent Claims (12, 13, 14, 15)
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Specification