Method of power conservation for organic light-emitting display according to light emitting area ratio

A method of driving an organic light-emitting display device, wherein the method comprises:

• extracting data from an input frame and setting a light-emitting level according to a light-emitting area and a change in a light-emitting degree of a light-emitting unit having a plurality of OLEDs;
• and
• controlling the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level and displaying an image when displaying an image contained in a next frame,
• wherein a power consumption of the light-emitting unit at a light-emitting area ratio less than 20% increases in proportion to the light-emitting area,
• wherein a power consumption of the light emitting unit at a light-emitting area ratio more than 20% remains at a constant value less than a predetermined value regardless of the light-emitting area,
• wherein the controlling of the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level to display the image comprises driving the OLEDs of the light-emitting unit with reference to a look-up table in which data for the light-emitting degree of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored,
• wherein the data for the light-emitting degree stored in the look-up table contains a maximum light-emitting time and/or maximum amount of light-emitting depending on the light-emitting area of the light-emitting unit, and
• wherein the data for the light-emitting degree stored in the look-up table is set such that the maximum light-emitting time and/or maximum amount of light-emitting of the light-emitting unit decreases as the light-emitting area of the light-emitting unit increases for the same light-emitting level.

A method of driving an organic light-emitting display device, wherein the method comprises:

• extracting data from an input frame and setting a light-emitting level according to a light-emitting area and a change in a light-emitting degree of a light-emitting unit having a plurality of OLEDs;
• and
• controlling the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level, and controlling an input current value to the light-emitting unit to display an image when displaying an image contained in a next frame,
• wherein a power consumption of the light-emitting unit at a light-emitting area ratio less than 20% increases in proportion to the light-emitting area,
• wherein a power consumption of the light emitting unit at a light-emitting area ratio more than 20% remains at a constant value less than a predetermined value regardless of the light-emitting area,
• wherein the controlling of the light-emitting area and/or light-emitting degree of the light-emitting unit according to the set light-emitting level to display the image comprises driving the OLEDs of the light-emitting unit with reference to a look-up table in which data for the light-emitting degree and an input current of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored,
• wherein the data for the light-emitting degree stored in the look-up table contains a maximum light-emitting time and/or maximum amount of light-emitting according to the light-emitting area of the light-emitting unit, and
• wherein the data for the light-emitting degree stored in the look-up table is set such that the maximum light-emitting time and/or maximum amount of light-emitting of the light-emitting unit decreases as the light-emitting area of the light-emitting unit increases for the same light-emitting level.

A mobile communication terminal comprising:

• an organic light-emitting display device including a light-emitting unit having a plurality of OLEDs to emit light, a light-emitting level setting unit, wherein the light-emitting level setting unit sets a light-emitting level according to a light-emitting area and/or a change in a light-emitting degree of the light-emitting unit, a look-up table in which data for the light-emitting degree of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored according to the light-emitting level set by the light-emitting level setting unit, and a light-emitting control unit capable of controlling the light-emitting area and the light-emitting degree of the light-emitting unit depending on a light-emitting level with reference to the data set on the look-up table when displaying an image contained in a next frame;
• a communication element to perform communication with the outside;
• and
• a controller to control the communication element and the organic light-emitting display device,
• wherein a power consumption of the light-emitting unit at a light-emitting area ratio less than 20% increases in proportion to the light-emitting area,
• wherein a power consumption of the light emitting unit at a light-emitting area ratio more than 20% remains at a constant value less than a predetermined value regardless of the light-emitting area,
• wherein the data for the light-emitting degree stored in the look-up table contains a maximum light-emitting time and/or maximum amount of light-emitting according to the light-emitting area of the light-emitting unit, and
• wherein the data for the light-emitting degree stored in the look-up table is set such that the maximum light-emitting time and/or maximum amount of light-emitting of the light-emitting unit decreases as the light-emitting area of the light-emitting unit increases for the same light-emitting level.

A mobile communication terminal comprising:

• an organic light-emitting display device including:
• a light-emitting unit having a plurality of OLEDs to emit light, a light-emitting level setting unit, wherein the light-emitting level setting unit sets a light-emitting level depending on a light-emitting area and/or a change in a light-emitting degree of the light-emitting unit, a look-up table in which data for the light-emitting degree of the light-emitting unit that corresponds to each light-emitting area for each light-emitting level is set and stored according to the light-emitting level set by the light-emitting level setting unit, and a light-emitting control unit capable of controlling the light-emitting area and the light-emitting degree of the light-emitting unit according to a light-emitting level with reference to the data set on the look-up table when displaying an image contained in a next frame;
• and
• a controller capable of transmitting image signals to the organic light-emitting display device,
• wherein a power consumption of the light-emitting unit at a light-emitting area ratio less than 20% increases in proportion to the light-emitting area,
• wherein a power consumption of the light emitting unit at a light-emitting area ratio more than 20% remains at a constant value less than a predetermined value regardless of the light-emitting area,
• wherein the data for the light-emitting degree stored in the look-up table contains a maximum light-emitting time and/or maximum amount of light-emitting according to the light-emitting area of the light-emitting unit, and
• wherein the data for the light-emitting degree stored in the look-up table is set such that the maximum light-emitting time and/or maximum amount of light-emitting of the light-emitting unit decreases as the light-emitting area of the light-emitting unit increases for the same light-emitting level.