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AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsShunpei Yamazaki, Yasuhiko Takemura
Estimating the term…
An electro-optical display device operating in an active matrix mode, comprising pixels each provided with a first element for selecting the pixel, a second element for supplying electric current to the pixel in accordance with the information transferred from the first element, and a memory element which stores the signal having output from the first element. Also claimed is a method of displaying images using an electro-optical display device operating in an active matrix mode, said method comprising rewriting only the specified pixels, or comprising rewriting only the specified lines during one frame, or comprising taking the period of scanning (addressing) the image plane longer than the period of alternating the polarity of the electric current applied to the pixels.
An electro-optical device of an active matrix type comprising:
The method of driving an electro-optical device comprising the steps of:
A method of driving an electro-optical device of an active matrix type, having a plurality of pixels, each of said pixels being provided with a first switching element for selecting a corresponding pixel in response to a select signal supplied thereto, a nonvolatile memory element comprising a ferroelectric capacitor for storing an output of said first switching element, and a second switching element for switching the corresponding pixel in response to the output of said first switching element stored by said memory element such that the second switching element is turned on when the stored output exceeds a predetermined voltage so that electric power can be fed to said pixel and whereby the spontaneous polarization of the ferroelectric capacitor defines a lower limit for said stored output while said electric power is being fed to said pixel and whereby the ferroelectric capacitor, in response to storing a further output of said first switching element, is reversed in polarity to turn the second element off so that the electric power can not be fed to the pixel, said method comprising the steps of:
A method of driving an electro-optical device of an active matrix type wherein said electro-optical device comprises an addressing line, a data line, a voltage supplying line, a first transistor, a second transistor, and a non-volatile capacitor connected between said first transistor and said second transistor, and said addressing line is connected with a gate electrode of said first transistor and said data line is connected with a drain of said first transistor and said voltage supplying line is connected with a drain of said second transistor, and wherein said nonvolatile capacitor comprises a pair of electrodes and a ferroelectrics provided between said electrodes, and one of said electrodes is connected with a source of said first transistor and the other one of said electrodes is connected with a gate electrode of said second transistor, said method comprising the step of:
Dependencies are inferred from the claim text.