Method for driving transflective liquid crystal display
First Claim
1. A method for driving a transflective LCD, wherein the transflective LCD has a plurality of pixels arranged in a matrix, each including a reflective cell and a transmission cell, the reflective cell having a first storage capacitor and a first active device, and the transmission cell having a second storage capacitor and a second active device, the method comprising the steps of:
- providing first switching devices coupled between the reflective cells of the pixels and first driving voltages respectively;
providing second switching devices coupled between the transmission cells of the pixels and second driving voltages respectively;
turning on all the first switching devices and scanning the reflective cells in turn to apply the first driving voltages to the reflective cells in turn; and
turning on all the second switching devices and scanning the transmission cells in turn to apply the second driving voltages to the transmission cells in turn;
wherein the first driving voltages are applied to the reflective cells in turn and the second driving voltages are applied to the transmission cells in turn in one frame period.
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Abstract
A method for driving a transflective LCD. In the present invention, the transflective LCD has a plurality of pixels arranged in a matrix, and each pixel includes a reflective cell and a transmission cell. The reflective cell and transmission cells are driven by different transistors. In the method of the present invention, all the first switching devices are turned on and the first driving voltages are then applied to the reflective cells in turn. After that, all the second switching devices are turned on and the second driving voltages are then applied to the transmission cells in turn. The first driving voltages are applied to the reflective cells in turn and the second driving voltages are applied to the transmission cells in turn in one frame period.
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Citations
10 Claims
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1. A method for driving a transflective LCD, wherein the transflective LCD has a plurality of pixels arranged in a matrix, each including a reflective cell and a transmission cell, the reflective cell having a first storage capacitor and a first active device, and the transmission cell having a second storage capacitor and a second active device, the method comprising the steps of:
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providing first switching devices coupled between the reflective cells of the pixels and first driving voltages respectively; providing second switching devices coupled between the transmission cells of the pixels and second driving voltages respectively; turning on all the first switching devices and scanning the reflective cells in turn to apply the first driving voltages to the reflective cells in turn; and turning on all the second switching devices and scanning the transmission cells in turn to apply the second driving voltages to the transmission cells in turn; wherein the first driving voltages are applied to the reflective cells in turn and the second driving voltages are applied to the transmission cells in turn in one frame period. - View Dependent Claims (2, 3)
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4. A method for driving a transflective LCD, wherein the transflective LCD has a plurality of pixels arranged in a matrix, each pixel including a reflective cell and a transmission cell, the reflective cell having a first storage capacitor and a first active device and the transmission cell having a second storage capacitor and a second active device, the method comprising the steps of:
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providing first switching devices coupled between the reflective cells of the pixels and first driving voltages respectively; providing second switching devices coupled between the transmission cells of the pixels and second driving voltages respectively; scanning each row of the pixels in turn in one frame period; and turning on the first switching device and the second device at different times to apply the first driving voltage to the reflective cells and the second driving voltage to the transmission cells respectively, when each pixel row is scanned. - View Dependent Claims (5, 6, 7)
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8. A method for driving a transflective LCD, wherein the transflective LCD has a plurality of pixels arranged in a matrix, each pixel including a reflective cell and a transmission cell, the reflective cell having a first storage capacitor and a first active device and the transmission cell having a second storage capacitor and a second active device, the method comprising the steps of:
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providing first switching devices coupled between the reflective cells of the pixels and first driving voltages respectively; providing second switching devices coupled between the transmission cells of the pixels and second driving voltages respectively; scanning each row of the pixels in turn in one frame period; and turning on the first switching device and the second switching devices simultaneously to apply the first driving voltages to the reflective cells and the second driving voltage to the transmission cells simultaneously when each pixel row is scanned, wherein the second switching devices are turned off earlier than the first switching devices.
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9. A method for driving a transflective LCD, wherein the transflective LCD has a plurality of pixels arranged in a matrix, each pixel including a reflective cell and a transmission cell, the reflective cell having a first storage capacitor and a first active device and the transmission cell having a second storage capacitor and a second active device, the method comprising the steps of:
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providing first switching devices coupled between the reflective cells of the pixels and first driving voltages respectively; providing second switching devices coupled between the transmission cells of the pixels and second driving voltages respectively; and turning on the first switching devices to apply the first driving voltages to the reflective cells of the pixels and scanning each row of the pixels in turn simultaneously in one frame period.
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10. A method for driving a transflective LCD, wherein the transflective LCD has a plurality of pixels arranged in a matrix, each pixel including a reflective cell and a transmission cell, the reflective cell having a first storage capacitor and a first active device and the transmission cell having a second storage capacitor and a second active device, the method comprising the steps of:
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providing first switching devices coupled between the reflective cells of the pixels and first driving voltages respectively; providing second switching devices coupled between the transmission cells of the pixels and second driving voltages respectively; and turning on the second switching devices to apply the second driving voltages to the transmission cells of the pixels and scanning each row of the pixels in turn simultaneously in one frame period.
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Specification