Reduce blue light at set-top box to assist with sleep
In some embodiments, a method, system, or computer-readable storage device including instructions for reducing the blue light component of displayed video can include one or more of the following features: receiving, at a set-top box, a video signal having a white color balance, the white color balance including a red component value. The set-top box can determine that the current time is after a threshold night value and before a threshold morning value and, based on that, adjust the white color balance of the video signal to increase the red component value. The set-top box can then transmit the video signal with the adjusted white color balance to a display device.
1. A method for reducing a blue light component of displayed video, comprising:
receiving, at a set-top box, a video signal having a white color balance, the white color balance including a red component value;
adjusting, by the set-top box, the white color balance of the video signal by:
when a current time reaches a predefined period of time before a threshold night value, gradually adjusting the white color balance of the video signal to increase the red component value to a set value incrementally over the predefined period of time,
when the current time is after the threshold night value and before the predefined period of time before a threshold morning value, adjusting the white color balance of the video signal to maintain the red component value at the set value, and
when the current time reaches the predefined period of time before the threshold morning value, gradually adjusting the white color balance of the video signal to decrease the red component value from the set value incrementally over the predefined period of time; and
transmitting, from the set-top box, the video signal with the adjusted white color balance to a display device.
2. The method for reducing the blue light component of displayed video of claim 1 , when the current time reaches the threshold night value, the red component value is a configured maximum value.
3. The method for reducing the blue light component of displayed video of claim 1 , further comprising:
providing, by the set-top box, a user interface for configuring one or more parameters.
4. The method for reducing the blue light component of displayed video of claim 3 , wherein the one or more parameters comprise:
the threshold night value; and
the threshold morning value.
5. The method for reducing the blue light component of displayed video of claim 3 , wherein the one or more parameters comprise:
the threshold night value;
the threshold morning value;
the predefined period of time; and
the set value.
6. The method for reducing the blue light component of displayed video of claim 1 , wherein the white color balance of the video signal adjusted to increase the red component value has a blue component value insufficient to disrupt the circadian rhythm of a human.
7. A system for reducing a blue light component of displayed video, comprising:
a processor; and
a memory, the memory containing instructions that, when executed by the processor, cause the processor to:
receive a video signal having a white color balance, the white color balance including a red component value;
adjust the white color balance of the video signal by:
when a current time reaches a predefined period of time before a threshold night value, gradually adjust the white color balance of the video signal to increase the red component value to a set value incrementally over the predefined period of time,
when the current time is after the threshold night value and before the predefined period of time before a threshold morning value, adjust the white color balance of the video signal to maintain the red component value at the set value, and
when the current time reaches the predefined period of time before the threshold morning value, gradually adjust the white color balance of the video signal to decrease the red component value from the set value incrementally over the predefined period of time; and
transmit the video signal with the adjusted white color balance to a display device.
8. The system for reducing the blue light component of displayed video of claim 7 , wherein when the current time reaches the threshold night value, the red component value is a maximum value and a blue component value of the white color balance is a minimum value.
9. The system for reducing the blue light component of displayed video of claim 7 , wherein the instructions comprise further instructions that cause the processor to:
provide a user interface for configuring one or more parameters.
10. The system for reducing the blue light component of displayed video of claim 9 , wherein the one or more parameters comprise:
the threshold night value; and
the threshold morning value.
11. The system for reducing the blue light component of displayed video of claim 9 , wherein the one or more parameters comprise:
the threshold night value;
the threshold morning value;
the predefined period of time; and
the set value.
12. The system for reducing the blue light component of displayed video of claim 7 , wherein the white color balance of the video signal adjusted to increase the red component value has a blue component value insufficient to disrupt the circadian rhythm of a human.
13. A machine-readable storage device having stored thereon instructions for reducing the blue light component of displayed video, the instructions causing one or more processors to perform operations, including:
receiving a video signal having a white color balance, the white color balance including a red component value;
adjusting the white color balance of the video signal by:
when a current time reaches a predefined period of time before a threshold night value, gradually adjusting the white color balance of the video signal to increase the red component value to a set value incrementally over the predefined period of time,
when the current time is after the threshold night value and before the predefined period of time before a threshold morning value, adjusting the white color balance of the video signal to maintain the red component value at the set value, and
when the current time reaches the predefined period of time before the threshold morning value, gradually adjusting the white color balance of the video signal to decrease the red component value from the set value incrementally over the predefined period of time; and
transmitting the video signal with the adjusted white color balance to a display device.
14. The machine-readable storage device of claim 13 , wherein at an end of the predefined period of time the red component value is a maximum value and a blue component value of the white color balance is a minimum value.
15. The machine-readable storage device of claim 13 , having stored thereon instructions for causing one or more processors to perform further operations, including:
providing a user interface for configuring one or more parameters, wherein the one or more parameters comprise:
the threshold night value; and
the threshold morning value.
16. The machine-readable storage device of claim 13 , having stored thereon instructions for causing one or more processors to perform further operations, including:
providing a user interface for configuring one or more parameters, wherein the one or more parameters comprise:
the threshold night value;
the threshold morning value;
the predefined period of time; and
the set value.
17. The machine-readable storage device of claim 13 , wherein the white color balance of the video signal adjusted to increase the red component value has a blue component value insufficient to disrupt the circadian rhythm of a human.
18. The method for reducing the blue light component of displayed video of claim 1 , wherein adjusting the white color balance of the video signal to increase the red component value to a set value comprises reducing the blue component value.
19. The system for reducing the blue light component of displayed video of claim 7 , wherein adjusting the white color balance of the video signal to increase the red component value to a set value comprises reducing the blue component value.
20. The machine-readable storage device of claim 13 , wherein adjusting the white color balance of the video signal to increase the red component value to a set value comprises reducing the blue component value.