Display device and driving method thereof
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsMasami Endo, Jun Koyama, Toshihiko Saito
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Abstract
Regarding the time gradation method as the digital gradation expression method, it is an object of the invention to provide a display device which prevents a reduction of frame frequency and implements a low-power-consumption SRAM. The invention overcomes the aforementioned disadvantages of conventional technique by synchronizing a writing and reading by utilizing read and write signals of which states read at a certain timing to select which of two memories is efficient to be written.
Claims4
A display device having a light emitting element and expressing a gradation with a length of lighting time,
- said display device comprising:
- first and second memories;
- a conversion circuit to convert video signals from serial to parallel;
- and
- first switch and second switch,
- wherein the video signal is inputted to said first memory or said second memory through said first switch after converted to parallel by said conversion circuit, and
- an output signal of said first memory or said second memory is inputted to a display through said second switch.
Dependencies are inferred from the claim text.