Throttling power consumption based on a current draw of an organic light emitting diode (OLED)
View Patent ↗Embodiments of systems and methods for power control in an Organic Light Emitting Diode (OLED) display device are described. In an embodiment, a method includes monitoring a level of current draw from an Organic Light Emitting Diode (OLED) display device. The method may also include comparing the level of current draw to a threshold value. Additionally, a method may include throttling system power consumption in response to the level of current draw exceeding the threshold value.
1. A method, comprising: monitoring a level of current draw from an Organic Light Emitting Diode (OLED) display device; comparing the level of current draw to a threshold value; throttling system power consumption in response to the level of current draw exceeding the threshold value; and calibrating the threshold value, wherein the step of calibrating comprises: causing the OLED display device to display white on each pixel; measuring the level of current draw while the OLED display device is displaying white on each pixel; and setting a scaling function to set thresholds at predetermined ratios of full power when the OLED display device is displaying white on each pixel.
2. The method of claim 1 , wherein the step of calibrating the threshold value is performed at system startup, and wherein the method further comprises initializing the Organic Light Emitting Diode (OLED) display device at full power before monitoring the level of current draw.
3. The method of claim 1 , further comprising: measuring a time interval in which the level of current draw exceeds the threshold; and determining whether the level of current draw has exceeded the threshold for the time interval, wherein the step of throttling system power consumption comprises throttling system power consumption when the level of current draw has exceeded the threshold for the time interval.
4. The method of claim 3 , further comprising: determining whether the level of current draw drops below the threshold; and restoring the system power consumption to full power.
5. The method of claim 1 , wherein throttling the system power comprises changing a power state.
6. The method of claim 1 , wherein throttling the system power comprises subsampling one or more OLEDs in the OLED display device.
7. The method of claim 1 , wherein throttling the system power comprises disabling a portion of blue LEDs in the OLED display device.
8. The method of claim 1 , wherein throttling the system power comprises throttling an intensity of the OLED display device.
9. The method of claim 1 , wherein throttling the system power comprises reducing a resolution of the OLED display device by disabling all OLED devices of a first pixel of the OLED display device except a first OLED device and disabling all OLED devices of a second pixel of the OLED display device except a different second OLED device.
10. The method of claim 1 , wherein throttling the system power comprises disabling one OLED device of a first pixel of the OLED display device and disabling a different OLED device of a second pixel of the OLED display device, such that an overall balance of color displayed by the OLED display device is maintained.
11. A system, comprising: a current sensor device configured to monitor a level of current draw from an Organic Light Emitting Diode (OLED) display device; a controller coupled to the current sensor device, the controller configured to: monitor a level of current draw from an Organic Light Emitting Diode (OLED) display device; compare the level of current draw to a threshold value; throttle system power consumption in response to the level of current draw exceeding the threshold value; and calibrate the threshold value, wherein the threshold value is calibrated by: causing the OLED display device to display white on each pixel; measuring the level of current draw while the OLED display device is displaying white on each pixel; and setting a scaling function to set thresholds at predetermined ratios of the power when the OLED display device is displaying white on each pixel.
12. The system of claim 11 , wherein the step of calibrating the threshold value is performed at system startup, and wherein the controller is configured to initialize the Organic Light Emitting Diode (OLED) display device at full power before monitoring the level of current draw.
13. The system of claim 11 , wherein the controller is further configured to: measure a time interval in which the level of current draw exceeds the threshold; and determine whether the level of current draw has exceeded the threshold for the time interval, wherein the system power consumption is throttled when the level of current draw has exceeded the threshold for the time interval.
14. The system of claim 13 , wherein the controller is further configured to: determine whether the level of current draw drops below the threshold; and restore the system power consumption to full power.
15. The system of claim 11 , wherein the controller is configured to throttle system power consumption by changing a power state.
16. The system of claim 11 , wherein the controller is configured to throttle system power consumption by sub-sampling one or more OLEDs in the OLED display device.
17. The system of claim 11 , wherein the controller is configured to throttle system power consumption by disabling a portion of blue LEDs in the OLED display device.
18. The system of claim 11 , wherein the controller is configured to throttle system power consumption by throttling an intensity of the OLED display device.
19. The system of claim 11 , wherein the controller is configured to throttle system power consumption by reducing a resolution of the OLED display device by disabling all OLED devices of a first pixel of the OLED display device except a first OLED device and disabling all OLED devices of a second pixel of the OLED display device except a different second OLED device.
20. The system of claim 11 , wherein the controller is configured to throttle system power consumption by disabling one OLED device of a first pixel of the OLED display device and disabling a different OLED device of a second pixel of the OLED display device, such that an overall balance of color displayed by the OLED display device is maintained.