Display device and method for driving the same

A method of driving a display device for time division multiple-level gray scale picture display, comprising the steps of:

• selecting a value indicating a number of sub-frames to be displayed within a period of a frame of an input display data signal in accordance with a frequency of a vertical synchronization signal;
• providing a sub-frame selection signal corresponding to the selected value;
• and
• controlling display of a multi-level gray scale picture in accordance with the selected value.

A display device for time division multiple-level gray scale picture display, comprising:

• a conversion table section
• that stores a first conversion table,
• receives an address signal formed by a specified number of upper bits of a multiple-level gray scale signal having a first plurality of bits corresponding to a first plural level gray scale, and
• converts the address signal through the first conversion table to output a duplicated sub-frame conversion signal having a second plurality of bits corresponding to a second plural level gray scale and having a predetermined plurality of sub-frames for each frame of the multiple-level gray scale signal;
• a synthesizer, coupled to said conversion table section, that synthesizes a remaining number of lower bits of the multiple-level gray scale signal with a number of lower bits of the duplicated sub-frame conversion signal according to the second plural level gray scale to produce a plural-subframes signal for a frame of the multiple-level gray scale signal;
• and
• a display control circuit, coupled to said synthesizer, that displays a multiple-level gray scale picture on a display according to the plural-subframes signal.

A display device for time division multiple-level gray scale picture display, comprising:

• a conversion table section that stores a conversion table,
• receives an address signal formed by a specified number of upper bits of a multiple-level gray scale signal having a first plurality of bits corresponding to a first plural level gray scale, and
• converts the address signal through the conversion table to output a duplicated sub-frame conversion signal having a second plurality of bits corresponding to a second plural-level gray scale and having a predetermined plurality of sub-frames for each frame of the multiple-level gray scale signal, the predetermined plurality of sub-frames including a plurality of sub-frames having a uniform gray scale weight value;
• a synthesizer, coupled to said conversion table section, that
• shifts a remaining number of lower bits of the multiple-level gray scale signal by a specified shift bit number of bits when the second plurality of bits is larger than the first plurality of bits, and
• synthesizes the shifted remaining number of lower bits with a number of lower bits of the duplicated sub-frame conversion signal according to the gray scale of the second plurality of bits, to produce a plural-subframes signal for a frame of the multiple-level gray scale signal;
• a limit circuit coupled to said conversion table section at a front stage thereof, that limits a gray scale level of the multiple-level gray scale signal to a level not higher than a specified gray scale level when the gray scale level of the multiple-level gray scale signal is higher than a maximum gray scale level of the plural-subframes signal, the specified gray scale level being defined by the maximum gray scale level;
• and
• a display control circuit, coupled to said synthesizer, that displays a multiple-level gray scale picture on a display according to the plural-subframes signal.

A method of time division multiple-level gray scale picture display, comprising the steps of:

• receiving an address signal formed by a specified number of upper bits of a multiple-level gray scale signal having a first plurality of bits corresponding to a first plural-level gray scale;
• converting the address signal using a conversion table to output a duplicated sub-frame conversion signal having a second plurality of bits corresponding to a second plural-level gray scale, and having a predetermined plurality of sub-frames for each frame of the multiple-level gray scale signal;
• synthesizing a remaining number of bits of the multiple-level gray scale signal with a number of lower bits of the duplicated sub-frame conversion signal according to the second plural-level gray scale to produce a plural-subframes signal for a frame of the multiple-level gray scale signal;
• and
• displaying a multiple-level gray scale picture on a display according to the plural-subframes signal.