LED driver and method of operating a camera
AssigneeEldolab Holding B.V.
InventorAndy Johanna Elisabeth Otten
Life of this patent
Estimating the term…
Abstract
Disclosed is a method of capturing an image of a scene using a user device having a rolling shutter camera. The scene is subjected to an illumination by an LED light source. The method includes providing, by the user device, a notification signal to the LED light source, the notification signal being indicative of a capturing or imminent capturing of an image; adjusting, by the LED light source, an operating characteristic of the LED light source, based on the notification signal; and capturing, by the rolling shutter camera, the image of the scene, while the LED light source is operating at the adjusted operating characteristic.
Claims24
A method of capturing an image of a scene using a user device having a rolling shutter camera, the scene being subjected to an illumination by an LED light source, the method comprising:
- receiving, by the user device, an illumination signal of the LED light source;
- establishing, by the user device, that the LED light source is operating in a visible light communication (VLC) mode;
- providing, by the user device, a notification signal to the LED light source, the notification signal being indicative of a capturing or imminent capturing of an image;
- adjusting, by the LED light source, an operating characteristic of the LED light source, based on the notification signal;
- and
- capturing, by the rolling shutter camera, the image of the scene, while the LED light source is operating at the adjusted operating characteristic.
A method of capturing an image of a scene using a user device, the scene being subjected to an illumination by an LED light source, the method comprising:
- receiving, by the user device, an illumination signal of the LED light source;
- establishing, by the user device, that the LED light source is operating in a visible light communication (VLC) mode;
- providing, by the user device, a notification signal to the LED light source, the notification signal being indicative of a capturing or imminent capturing of an image;
- adjusting, by the LED light source, an operating characteristic of the LED light source, based on the notification signal;
- and
- capturing the image of the scene by the user device while the LED light source is operating at the adjusted operating characteristic.
An LED driver for powering an LED based light source, the LED driver comprising:
- a power converter configured to convert a supply power to an output power for the LED based light source;
- a control unit configured to:
- receive an input signal representing a desired illumination;
- control the output power so as to generate the desired illumination, and to operate the LED based light source in a visible light communication (VLC) mode;
- and
- receive a notification signal from a user device, the notification signal indicative of a capturing or imminent capturing of an image;
- wherein the control unit is further configured to, upon receipt of the notification signal, adjust an operating characteristic of the power converter, at least during the capturing of the image, thereby operating the LED based light source at an adjusted illumination.
Dependencies are inferred from the claim text.