Driving groups of pixels of a light source so as to produce a light transition
AssigneeValeo Vision
InventorStephane Andre
Life of this patent
Estimating the term…
Abstract
A method for controlling a pixelated light source which includes a plurality of pixels. Following the receipt of a command to transition from an initial beam to a target beam, a target luminosity based on the target beam is defined for each pixel of the pixelated light source. The pixels of the light source are then grouped into at least two groups of pixels and the method includes successively driving the groups of pixels. Driving a group of pixels includes modifying the luminosity of each pixel of the group, from an initial luminosity to the target luminosity of the pixel.
Claims16
A method for controlling a pixelated light source of a lighting or signaling system for a light transition from an initial beam to a target beam, the pixelated light source comprising a plurality of pixels, the method comprising the following steps:
- receiving a command to transition from the initial beam to the target beam;
- for each pixel of the pixelated light source, defining a target luminosity based on the target beam;
- for each pixel of the pixelated light source, converting the target luminosity into target electrical parameters;
- grouping the pixels of the light source into at least two groups of pixels, each group of pixels comprising at least one pixel;
- and
- successively driving the groups of pixels, driving a group of pixels comprising modifying the luminosity of each pixel of the group, from an initial luminosity to the target luminosity of the pixel by adjusting the electrical parameters of the pixel to the target electrical parameters, wherein
- the target electrical parameters are among at least one of a duty cycle of a pulse-width modulation signal, and an electric current, and
- during the step of successively driving the group of pixels, each pixel is driven through at least one intermediary luminosity.
A lighting or signaling system of an automotive vehicle, comprising a pixelated light source and a control module for controlling the pixelated light source, wherein the pixelated light source comprises a plurality of pixels and the control module comprises:
- a first interface configured to receive a command to transition from an initial beam to a target beam;
- a processor configured to
- define, for each pixel of the pixelated light source, a target luminosity based on the target beam,
- group the pixels of the pixelated light source into at least two groups of pixels, each group of pixels comprising at least one pixel, and
- convert, for each pixel of the pixelated light source the target luminosity into target electrical parameters;
- and
- a second interface configured to successively drive the groups of pixels, the driving of the group of pixels comprising modifying the luminosity of each pixel of the group, from an initial luminosity to the target luminosity of the pixel by adjusting the electrical parameters of the pixel to the target electrical parameters, wherein
- the target electrical parameters are among at least one of a duty cycle of a pulse-width modulation signal, and an electric current, and
- the second interface is further configured to drive each pixel of the group of pixels through at least one intermediary luminosity while driving each pixel to the target luminosity.
Dependencies are inferred from the claim text.