Electro-optical device, gray scale display method, and electronic apparatus
First Claim
1. A gray scale display method for providing memories that respectively store each bit of gray scale data which indicates gray shade and that cause pixels arranged in a matrix in the row direction and in the column direction to produce a gray scale display, said gray scale display method comprising the steps of:
- dividing one field into subfields corresponding to bits of said gray scale data;
setting a period of each subfield in such a manner as to correspond to a weight of each of said bits;
in each subfield and with respect to each pixel having a plurality of bit memories and a self-rewritable memory,reading, from one of the said memories, a bit corresponding to the subfield within the gray scale data corresponding to the pixel,latching the bit,producing at least one of an ON display and an OFF display according to the bit, andwriting the latched bit to the one of the memories via said self-rewritable memory.
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Accused Products
Abstract
The invention produces a high-quality display, in which the occurrence of display variations is reduced, with low power consumption. One field is divided into subfields corresponding to the bits of gray scale data, and the period of each subfield is set in such a manner as to correspond to the weight of each bit. A pixel includes memories that store bits of the gray scale data, a selector that selects a memory that stores the bit corresponding to the subfield from among these memories, a closed loop of inverters, and a TFT that reads and latches the bits stored in the selected memory and that rewrites into the selected memory, and complementary switches that select, with respect to a pixel electrode, a voltage corresponding to an ON display signal or an OFF display signal in accordance with the bit read from the selected memory.
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Citations
12 Claims
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1. A gray scale display method for providing memories that respectively store each bit of gray scale data which indicates gray shade and that cause pixels arranged in a matrix in the row direction and in the column direction to produce a gray scale display, said gray scale display method comprising the steps of:
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dividing one field into subfields corresponding to bits of said gray scale data; setting a period of each subfield in such a manner as to correspond to a weight of each of said bits; in each subfield and with respect to each pixel having a plurality of bit memories and a self-rewritable memory, reading, from one of the said memories, a bit corresponding to the subfield within the gray scale data corresponding to the pixel, latching the bit, producing at least one of an ON display and an OFF display according to the bit, and writing the latched bit to the one of the memories via said self-rewritable memory.
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2. An electro-optical device which has pixels arranged in a matrix in a row direction and in a column direction, which divides one field into subfields corresponding to bits of gray scale data, which sets a period of each subfield in such a manner as to correspond to a weight of each of said bits, and which causes each of said pixels to produce at least one of an ON display and an OFF display according to the corresponding bits within said gray scale data, said electro-optical device comprising for each of said pixels:
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a plurality of memories, each storing a respective bit of said gray scale data; a self-rewritable memory; a selector that selects a memory, that stores a bit corresponding to a subfield, from among said plurality of memories; a latch circuit that reads and latches the bit stored in the memory selected by said selector, and that rewrites in the memory via the self-rewritable memory; an on/off selection switch that selects a voltage corresponding to an ON display or an OFF display in accordance with the bit read from the memory selected by said selector; and a pixel electrode to which the voltage selected by said on/off selection switch is applied. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification