Data driver circuits for a display in which a data current is generated responsive to the selection of a subset of a plurality of reference currents based on a gamma signal and methods of operating the same

A method of operating a display device, comprising:

• generating L gray scale reference currents simultaneously, the L gray scale reference currents comprising K gamma reference current groups and being associated with non-zero gray scale levels, each of the K gamma reference current groups having M of the L scale reference currents as gamma reference currents;
• selecting M gamma reference currents, which are included in one of the K gamma reference current groups, from the L gray scale reference currents responsive to a gamma signal;
• generating a zero gray scale level gamma reference voltage;
• for each of a plurality of data lines:
• selecting one of the M gamma reference currents or the zero gray scale level gamma reference voltage responsive to a color signal;
• and
• generating a data current responsive to the selected one of the M gamma reference currents or zero gray scale level gamma reference voltage;
• and
• driving a plurality of scan lines to select respective ones of a plurality of pixels that are associated with respective pairs of ones of the plurality data lines and ones of the plurality of scan lines;
• wherein L is greater than one;
• and
• wherein generating the L gray scale reference currents comprises generating the L gray scale reference currents using a current mirror comprising L transistors having L different widths.

A method of operating a data driver for a display, comprising:

• generating L gray scale reference currents simultaneously, the L gray scale reference currents comprising K gamma reference current groups and being associated with non-zero gray scale levels, each of the K gamma reference current groups having M of the L scale reference currents as gamma reference currents;
• selecting M gamma reference currents, which are included in one of the K gamma reference current groups, from the L gray scale reference currents responsive to a gamma signal;
• selecting one of the M gamma reference currents responsive to a color signal;
• and
• generating a data current responsive to the selected one of the M gamma reference currents;
• wherein L is greater than one;
• and
• wherein generating the L gray a scale reference currents comprises generating the L gray scale reference currents using a current mirror comprising L transistors having L different widths.

A method of operating a display device, comprising:

• generating L gray scale reference currents simultaneously, the L gray scale reference currents comprising K gamma reference current groups and being associated with non-zero gray scale levels, each of the K gamma reference current groups having M of the L scale reference currents as gamma reference currents;
• selecting M gamma reference currents, which are included in one of the K gamma reference current groups, from the L gray scale reference currents responsive to a gamma signal;
• for each of a plurality of data lines:
• selecting one of the M gamma reference currents responsive to a color signal;
• and
• generating a data current responsive to the selected one of the M gamma reference currents;
• and
• driving a plurality of scan lines to select respective ones of a plurality of pixels that are associated with respective pairs of ones of the plurality data lines and ones of the plurality of scan lines;
• wherein L is greater than one;
• and
• wherein generating the L gray scale reference currents comprises generating the L gray scale reference currents using a current mirror comprising L transistors having L different widths.

A data driver for a display, comprising:

• a reference current generator that is configured to generate L gray scale reference currents, the L gray scale reference currents comprising K gamma reference current groups and being associated with non-zero gray scale levels, each of the K gamma reference current groups having M of the L scale reference currents as gamma reference currents;
• a gamma selection module that is configured to select M gamma reference currents, which are included in one of the K gamma reference current groups, from the L gray scale reference currents responsive to a gamma signal;
• a gamma voltage generator that is configured to generate a zero gray scale level gamma reference voltage;
• and
• a data current generator that is configured to generate a data current responsive to a selected one of the M gamma reference currents or the zero gray scale level gamma reference voltage responsive to a color signal;
• wherein L is greater than one;
• and
• wherein generating the L gray scale reference currents comprises generating the L gray scale reference currents using a current mirror comprising L transistors having L different widths.

A display device, comprising:

• a reference current generator that is configured to generate L gray scale reference currents, the L gray scale reference currents comprising K gamma reference current groups and being associated with non-zero gray scale levels, each of the K gamma reference current groups having M of the L scale reference currents as gamma reference currents;
• a gamma selection module that is configured to select M gamma reference currents, which are included in one of the K gamma reference current groups, from the L gray scale reference currents responsive to a gamma signal;
• a gamma voltage generator that is configured to generate a zero gray scale level gamma reference voltage;
• a plurality of data current generators associated with a plurality of data lines, respectively, respective ones of the data current generators being configured to generate a data current responsive to a selected one of the M gamma reference currents or the zero gray scale level gamma reference voltage responsive to a color signal;
• and
• a scan driver that is configured to drive a plurality of scan lines to select respective ones of a plurality of pixels that are associated with respective pairs of ones of the plurality data lines and ones of the plurality of scan lines;
• wherein L is greater than one;
• and
• wherein generating the L gray scale reference currents comprises generating the L gray scale reference currents using a current mirror comprising L transistors having L different widths.

A data driver for a display, comprising:

• a reference current generator that is configured to generate L gray scale reference currents;
• a gamma selection module that is configured to select M gamma reference currents from the L gray scale reference currents responsive to a gamma signal;
• and
• a data current generator that is configured to generate a data current responsive to a selected one of the M gamma reference currents responsive to a color signal;
• wherein L is greater than one;
• and
• wherein generating the L gray scale reference currents comprises generating the L gray scale reference currents using a current mirror comprising L transistors having L different widths.

A display device, comprising:

• a reference current generator that is configured to generate L gray scale reference currents, the L gray scale reference currents comprising K gamma reference current groups and being associated with non-zero gray scale levels, each of the K gamma reference current groups having M of the L scale reference currents as gamma reference currents;
• a gamma selection module that is configured to select M gamma reference currents, which are included in one of the K gamma reference current groups, from the L gray scale reference currents responsive to a gamma signal;
• a plurality of data current generators associated with a plurality of data lines, respectively, respective ones of the data current generators being configured to generate a data current responsive to a selected one of the M gamma reference currents responsive to a color signal;
• and
• a scan driver that is configured to drive a plurality of scan lines to select respective ones of a plurality of pixels that are associated with respective pairs of ones of the plurality data lines and ones of the plurality of scan lines;
• wherein L is greater than one;
• and
• wherein generating the L gray scale reference currents comprises generating the L gray scale reference currents using a current mirror comprising L transistors having L different widths.