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US 2008/0165309 A1Published application
Transflective Liquid Crystal Display
AssigneeChi Mei Optoelectronics Corp.
InventorsZhibing Ge, Xinyu Zhu, Thomas Xinzhang Wu, Shin-Tson Wu, Wang-Yang Li, Chung-Kuang Wei
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Abstract
A display includes pixel circuits each having a liquid crystal layer, a storage capacitor to store an electric charge corresponding to a data voltage, and a controller to enable different percentages of the data voltage to be applied to the liquid crystal layer depending on an operation state of the display.
Claims47
An apparatus comprising;
- a display comprising
- pixel circuits each comprising:
- a liquid crystal layer;
- a storage capacitor to store an electric charge corresponding to a data voltage;
- and
- a controller to enable different percentages of the data voltage to be applied to the liquid crystal layer depending on an operation state of the display.
3 more elements
An apparatus comprising
- a display comprising pixel circuits each comprising a liquid crystal layer, in which the display is capable of switching between a transmissive mode and a reflective mode by changing a percentage of a data voltage applied to the liquid crystal layer of each pixel circuit, the data voltage being associated with a gray level.
A display comprising
- pixel circuits, each pixel circuit comprising
- a liquid crystal layer, in which a portion of the liquid crystal layer is used to modulate light when the display is operating in a transmissive mode, and the same portion of the liquid crystal layer is used to modulate light when the display is operating in a reflective mode, and
- circuitry to control the amount of tilt of liquid crystal molecules in the liquid crystal layer for a given pixel data according to an operating mode of the display.
An apparatus comprising
- a liquid crystal cell;
- a first capacitor to store an electric charge corresponding to a data voltage associated with a gray-scale level;
- a second capacitor positioned in series with the liquid crystal cell, the second capacitor having a first node and a second node;
- a first transistor for driving the first capacitor;
- and
- a second transistor having a first node and a second node, the first and second nodes of the second transistor being coupled to the first and second nodes, respectively, of the second capacitor.
3 more elements
A display comprising
- a first conducting layer;
- a second conducting layer;
- a third conducting layer;
- a dielectric layer between the first and second conducting layers;
- a liquid crystal layer between the second and third conducting layers;
- a storage capacitor to apply a pixel data voltage to the first and third conducting layers;
- and
- a control unit to short-circuit the first and second conducting layers when operating the display in a reflective mode.
5 more elements
A method comprising:
- storing an electric charge in a storage capacitor of a pixel circuit of a display, the electric charge corresponding to a data voltage;
- and
- applying a percentage of the data voltage to a liquid crystal layer of the pixel circuit based on the transmissive or reflective operating mode of the display.
A method comprising:
- sending pixel data to a display capable of operating in a transmissive mode and a reflective mode, the data voltage being independent of the operating mode of the display;
- and
- controlling a percentage of the data voltage applied to pixel circuits of the display based on whether the display is operating in the transmissive mode or the reflective mode.
A method comprising:
- sending a data voltage to a display, the data voltage corresponding to a gray level to be shown on a pixel of the display, the pixel comprising a liquid crystal layer;
- and
- controlling an amount of tilt of liquid crystal molecules in the liquid crystal layer based on the data voltage and whether the display is operating in a transmissive mode or a reflective mode.
A method comprising
- controlling delivery of pixel data voltages from a data line to a first capacitor;
- during a first time period, applying pixel data voltages to a liquid crystal cell of the pixel and a second capacitor;
- and
- during a second time period, short-circuiting the second capacitor to apply the pixel data voltages to the liquid crystal cell.
1 more element
A method comprising:
- discharging charges accumulated on a floating electrode of a capacitor, the capacitor being connected in series with a liquid crystal cell to reduce an amount of pixel data voltage applied to the liquid crystal cell when operating a display in a reflective mode.
Dependencies are inferred from the claim text.