Method and apparatus for power control of an organic light-emitting diode panel and an organic light-emitting diode display using the same

1. A method for power control of an organic light-emitting diode (OLED) panel, comprising:

estimating a voltage value according to an image data of an image, the voltage value indicative of a minimal required voltage allowing the OLED panel to display the image;

estimating a first current value according to a plurality of luminance values converted from the image data, the first current value indicative of a load current flowing through the OLED panel associated with the image;

estimating a second current value according to the plurality of luminance values converted from the image data, the second current value indicative of a maximal current flowing through one of a plurality of OLED elements of the OLED panel associated with the image;

estimating a first voltage value according to the estimated first current value, the first voltage value indicative of a voltage drop of the OLED panel associated with the image;

estimating a second voltage value according to the estimated second current value, the second voltage value indicative of a maximal display voltage of the OLED panel associated with the image;

determining the voltage value indicative of the minimal required voltage according to a combination of the estimated first voltage value and the estimated second voltage value; and

controlling a voltage generator to adjust a booster voltage provided to the OLED panel according to the voltage value indicative of the minimal required voltage.

2. The method according to claim 1 , wherein in the step of estimating the first current value according to the plurality of luminance values converted from the image data of the image, the first current value is estimated according to a plurality of sub-pixel luminance values and a plurality of corresponding weighting values.

3. The method according to claim 1 , wherein the first voltage value is determined according to the first current value and a look-up table.

4. The method according to claim 1 , wherein in the step of estimating the second current value according to the plurality of luminance values converted from the image data, the second current value is estimated according to a plurality of sub-pixel luminance values and a plurality of corresponding weighting values.

5. The method according to claim 1 , wherein the second voltage value is determined according to the second current value and a look-up table.

6. The method according to claim 1 , wherein the step of estimating the first voltage value comprises:

determining the first voltage value indicative of the voltage drop according to the estimated first current value;

wherein the step of estimating the second voltage value comprises:

determining the second voltage value indicative of the minimal required voltage according to the estimated second current value.

7. The method according to claim 6 , further comprises:

limiting the estimated first current value and the estimated second current value,

wherein in the steps of determining the first voltage value and the second voltage value, the first voltage value and the second voltage value are determined according to the limited first current value and the limited second current value, respectively.

8. The method according to claim 7 , wherein the step of limiting the estimated first value and the estimated second value comprises:

determining a dim factor according to a ratio of a limit current value and the first current value; and

modifying the first current value and the second current value according to the dim factor.

9. An organic light-emitting diode (OLED) display, comprising:

an OLED panel having a plurality of OLED elements for displaying an image;

a load current estimation circuit for estimating a first current value according to a plurality of luminance values converted from an image data of the image, the first current value indicative of a load current flowing through the OLED panel associated with the image;

an OLED current estimation circuit for estimating a second current value according to the plurality of luminance values converted from the image data of the image, the second current value indicative of a maximal current flowing through one of a plurality of OLED elements of the OLED panel associated with the image;

a power estimation circuit for determining an estimated first voltage value indicative of the voltage drop according to the estimated first current value and determining an estimated second voltage value indicative of the maximal display voltage according to the estimated second current value; and

a power control apparatus for estimating a voltage value according to the image data of the image, the voltage value indicative of a minimal required voltage allowing the OLED panel to display the image, and for controlling a voltage generator to adjust a booster voltage provided to the OLED panel according to the estimated first voltage value and the estimated second voltage value.

10. The display according to claim 9 , wherein the second current value is estimated according to a plurality of sub-pixel luminance values and a plurality of corresponding weighting values.

11. An apparatus for power control of an organic light-emitting diode (OLED) panel, comprising:

a load current estimation circuit for estimating a first current value according to an image data of an image, the first current value relating to a voltage drop of the OLED panel associated with the image;

an OLED current estimation circuit for estimating a second current value according to the image data of the image, the second current value relating to a maximal display voltage of the OLED panel associated with the image;

a power estimation circuit for estimating a voltage value according to a combination of the estimated first current value and the estimated second current value, the voltage value indicative of a minimal required voltage allowing the OLED panel to display the image, and for controlling a voltage generator to adjust a booster voltage provided to the OLED panel according to the estimated voltage value;

a current limit circuit for limiting the estimated first current value and the estimated second current value; and

wherein the power estimation circuit determines the voltage value according to the limited first current value and the limited second current value.

12. The apparatus according to claim 11 , wherein current limit circuit comprises:

a dim factor determination unit for determining a dim factor according to a ratio of a limit current value and the first current value; and

a current modification unit for modifying the first current value and the second current value according to the dim factor.