| 摘要 |
PURPOSE: A self light emitting device and a driving method thereof are provided to prevent visualization of display irregularities such as pseudo contours by dividing sub-frame periods in order from the longest and by distributing the divided sub-frame periods within the one frame period in order not to appear consecutively. CONSTITUTION: An image is displayed using an n-bit digital video signal capable of displaying 1 to 2 gray scales. The right half portion of the pixel portion performs displaying 2 + 1 gray scale and the left half portion performs displaying 2 gray scale. In a case of using the n-bit digital video signal in accordance with a simple binary code method, n sub-frame periods(SF1 to SFn) appear within one frame period. The first bit of the digital signal to the n-th bit of the digital video signal correspond to the sub-frame periods(SF1 to SFn), respectively. The ratio of lengths of the sub-frame periods(SF1 to SFn) become 2 :: 2:: 2:: ... :: 2 :: 2. The length of the sub-frame period(SFn) corresponding to the most significant bit of the digital video signal is the longest, and the length of the sub-frame period(SF1) corresponding to the least significant bit of the digital video signal is the shortest. In a case of performing display of the 2 gray scale, the pixels are placed in an on state in the sub-frame periods(SF1 to SF(n-1)) and are placed in an off state during the sub-frame period(SFn). Further, the pixels are placed in a turned off state during the sub-frame periods(SF1 to SF(n-1)) and are turned on during the sub-frame period SFn, in performing display of the 2 + 1 gray scale.
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