Adjusting the refresh rate of a display

1. A method for adjusting a refresh rate of a display, said method comprising:

determining a current status of at least one lighting criterion, wherein said at least one lighting criterion comprises a backlight and ambient light, wherein different statuses of said backlight are given by said backlight being switched on or off, and wherein different statuses of said ambient light are given by different intensities of said ambient light; and

adjusting said refresh rate depending on said determined status,

wherein said refresh rate is set to a higher value when said backlight is determined to be switched on, or said refresh rate is varied at higher values depending on a determined intensity of said ambient light when said backlight is determined to be switched on, and

wherein said refresh rate is varied at lower values depending on a determined intensity of said ambient light when said backlight is determined to be switched off.

2. The method according to claim 1 ,

wherein a refresh on said display is stopped, when said backlight is determined to be switched off and a determined intensity of ambient light falls below a predetermined threshold value.

3. The method according to claim 2 , wherein said refresh rate adjustment is performed for a full display mode and for a partial display mode, and wherein only in said partial display mode a refresh on said display is stopped, when said backlight is determined to be switched off and a determined intensity of ambient light falls below a predetermined threshold value.

4. The method according to claim 1 , wherein said refresh rate adjustment is performed for at least one of a full display mode and a partial display mode.

5. An apparatus comprising:

a display adapted to operate with different refresh rates; and

a processor configured to determine a current status of at least one lighting criterion and configured to adjust a refresh rate of said display based on said determined status;

wherein said at least one lighting criterion comprises a backlight and ambient light, wherein different statuses of said backlight are given by said backlight being switched on or off, and wherein different statuses of said ambient light are given by different intensities of said ambient light;

wherein said processor is configured to set said refresh rate to a higher value when said backlight is determined to be switched on, or to vary said refresh rate at higher values depending on a determined intensity of said ambient light when said backlight is determined to be switched on; and

wherein said processor is configured to vary said refresh rate at lower values depending on a determined intensity of said ambient light when said backlight is determined to be switched off.

6. The apparatus according to claim 5 , wherein said processor is configured to stop a refresh on said display, when said backlight is determined to be switched off and a determined intensity of ambient light falls below a predetermined threshold value.

7. The apparatus according to claim 6 , wherein said processor is configured to perform said refresh rate adjustment for a full display mode and for a partial display mode, and to stop a refresh on said display only in said partial display mode when said backlight is determined to be switched off and a determined intensity of ambient light falls below a predetermined threshold value.

8. The apparatus according to claim 5 , wherein said processor is configured to perform said refresh rate adjustment for at least one of a full display mode and a partial display mode.

9. The apparatus according to claim 5 , wherein said apparatus is an electronic device or a display module for an electronic device.

10. The apparatus according to claim 5 , wherein said apparatus is mobile phone or a personal digital assistant.

11. A software program product in which a software code for adjusting the refresh rate of a display is stored in a readable medium, said software code realizing the following steps when being executed by a processor:

determining a current status of at least one lighting criterion, wherein said at least one lighting criterion comprises a backlight and ambient light, wherein different statuses of said backlight are given by said backlight being switched on or off, and wherein different statuses of said ambient light are given by different intensities of said ambient light; and

adjusting said refresh rate depending on said determined status

wherein said refresh rate is set to a higher value when said backlight is determined to be switched on, or said refresh rate is varied at higher values depending on a determined intensity of said ambient light when said backlight is determined to be switched on; and

wherein said refresh rate is varied at lower values depending on a determined intensity of said ambient light when said backlight is determined to be switched off.

12. The software program product according to claim 11 , wherein said software code is adapted to stop a refresh on said display, when said backlight is determined to be switched off and a determined intensity of ambient light falls below a predetermined threshold value.

13. The software program product according to claim 12 , wherein said software code is adapted to perform said refresh rate adjustment for a full display mode and for a partial display mode, and to stop a refresh on said display only in said partial display mode, when said backlight is determined to be switched off and a determined intensity of ambient light falls below a predetermined threshold value.

14. The software program product according to claim 11 , wherein said software code is adapted to perform said refresh rate adjustment for at least one of a full display mode and a partial display mode.

15. An apparatus comprising:

means for determining a current status of at least one lighting criterion, wherein said at least one lighting criterion comprises a backlight and ambient light, wherein different statuses of said backlight are given by said backlight being switched on or off, and wherein different statuses of said ambient light are given by different intensities of said ambient light; and

means for adjusting a refresh rate of a display based on said determined status

by setting said refresh rate to a higher value when said backlight is determined to be switched on, or by varying said refresh rate at higher values depending on a determined intensity of said ambient light when said backlight is determined to be switched on; and

by varying said refresh rate at lower values depending on a determined intensity of said ambient light when said backlight is determined to be switched off.