| Patent application number | Description | Published |
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| 20100014032 | TRANSFLECTIVE DISPLAY - A multi-mode Liquid Crystal Display (LCD) capable of functioning in a multi-mode, a monochrome reflective mode and a color transmissive mode. One embodiment provides an LCD with color filters only over most or all of the transmissive part of a pixel but only part of the reflective portion of a pixel, enabling readability in the ambient light. Embodiments eliminate the black matrix mask used typically in color filter creation. Additionally, an embodiment provides diagonal pixels to improve the resolution of the LCD in the color transmissive mode. Further, an embodiment enables the light to switch between two colors, while a third color (typically green) is always on, thereby decreasing the required frame rate of the LCD, when used in the hybrid field sequential approach. Yet another embodiment creates colors from the backlight, eliminating the need for color filters. Another embodiment involves use of color filters over only the green pixels, eliminating the need for using additional masks for making the color filter array. | 01-21-2010 |
| 20100020054 | TRIPLE MODE LIQUID CRYSTAL DISPLAY - In an embodiment, a system comprises an LCD comprising a plurality of pixels each comprising a transmissive part; a reflective part; and a latched driving circuit. The driving circuit comprises a transmissive section comprising a transmissive data input coupled to the transmissive part of the pixel, and is configured to drive a transmissive data value from the transmissive data input and to set the transmissive part to a transmissive display state based on the transmissive data value; a reflective section comprising a reflective data input (independent of the transmissive data input) coupled to the reflective part of the pixel, and is configured to drive a reflective data value from the reflective data input and to set the reflective part to a reflective display state based on the reflective data value. | 01-28-2010 |
| 20100020276 | TRANSFLECTIVE DISPLAY WITH WHITE TUNING - In an embodiment, a multi-mode LCD comprises pixels, each comprising sub-pixels, each sub-pixel comprising a first polarizing layer; a second polarizing layer; a first substrate layer and an oppositely oriented second substrate layer, the first and second substrate layers are between the first and second polarizing layers; a liquid crystal material between the first and second substrate layers; a first reflective layer that is adjacent to the first substrate layer and comprises at least one opening that forms a transmissive part of the sub-pixel and wherein a remainder of the first reflective layer that forms a reflective part of the sub-pixel; a first filter of a first color opposite to and covering the transmissive part with an area larger than that of the transmissive part; a second filter of a second color opposite to and partially covering the reflective part, wherein the second color is different from the first color. | 01-28-2010 |
| 20100026930 | DIFFRACTIVE LIQUID CRYSTAL DISPLAY - A liquid crystal display (LCD) comprises a light source; a light diffractor over the light source configured to diffract light received from the light source; a liquid crystal diffraction grating over the light diffractor and between liquid crystal pixel structures comprising a plurality of liquid crystal pixels; the liquid crystal diffraction grating has a changed diffraction index in response to application of a voltage differential across the diffraction grating, and when having the changed diffraction index aligns diffracted light received from the light diffractor into aligned light directed toward the liquid crystal pixel structure. An LCD may comprise a plurality of liquid crystal pixels each comprising a reflective part and a transmissive part, the reflective part of at least some of the plurality of liquid crystal pixels comprising a retroreflector configured to reflect at least some light rays, received from an external light source, toward the external light source. | 02-04-2010 |
| 20100225640 | Switching Operating Modes of Liquid Crystal Displays - In an embodiment, a computer comprises a liquid crystal display (LCD) operable in a transmissive mode, a reflective mode, and a transflective mode; a display driver coupled to the LCD; one or more processors coupled to the display driver; mode switching logic coupled to the one or more processors and/or to the display driver; one or more electronic input sources coupled to the mode switching logic and providing input signals to the mode switching logic, wherein the input signals represent states of ambient conditions, other computer elements, user input, or user applications of the computer; and the mode switching logic is configured to cause the one or more processors to perform receiving one or more of the input signals; based on the input signals, selecting a particular operational mode for the LCD from among the transmissive mode, the reflective mode, and the transflective mode; causing the LCD to operate in the particular operational mode. | 09-09-2010 |
| 20100225857 | BACKLIGHT RECIRCULATION IN TRANSFLECTIVE LIQUID CRYSTAL DISPLAYS - Techniques are provided to recycle light from a backlight unit that is otherwise blocked in a reflective part of a pixel in a transflective LCD. The light is redirected into a transmissive part of the pixel and hence enhances light efficiency and luminance of the pixel. The techniques can be used in a transflective LCD that transmits light in a circularly polarized state, or a linearly polarized state. | 09-09-2010 |
| 20110025960 | Transflective Display Sub-Pixel Structures - A liquid crystal display comprises a plurality of pixels, each pixel comprising three or more sub-pixels. A first sub-pixel of the three or more sub-pixels comprises a first transmissive part that has a first transmissive area, and a first reflective part having a first reflective area. A second sub-pixel comprises a second transmissive part that has a second transmissive area, and a second reflective part that has a second reflective area. A third sub-pixel comprises a third transmissive part that has a third transmissive area, and a third reflective part that has a third reflective area. At least two among the first transmissive area, the second transmissive area, and the third transmissive area are different in size. The first reflective area, the second reflective area, and the third reflective area are equal in size. | 02-03-2011 |
| 20110285684 | Low Power Consumption Transflective Liquid Crystal Displays - Techniques are provided to drive a normally white or mixed mode LCD with low voltages and low power consumption. A sub-pixel in the LCD may comprise a reflective part and a transmissive part. The cell gap for a liquid crystal layer in the sub-pixel may provide at least a half-wave phase retardation. A driving voltage range with a maximum voltage at a low value may be used to drive the reflective part and the transmissive part of the sub-pixel to various levels of brightness. | 11-24-2011 |
