Display device with backlight unit having switchable multi-coloured lightsources

A system comprising:

• tracking means;
• a display device comprising:
• a backlight unit comprising a plurality of light sources that are controllable, to switch between lights of different colours;
• an active panel comprising:
• a liquid crystal (LC) layer comprising a plurality of LC cells;
• a linear polarizer arranged on an optical path of the LC layer;
• and
• a drive circuit employed to individually control the plurality of LC cells of the LC layer;
• and
• at least one processor configured to:
• obtain at least one predefined sequence in which sub-images of a given image are to be displayed via the display device, wherein each of the sub-images corresponds to a respective one of at least two different colours;
• and
• display the sub-images of the given image by employing temporal multiplexing, wherein when displaying the sub-images of the given image, the at least one processor is configured to:
• generate different sets of drive signals corresponding to respective ones of the sub-images of the given image, based on the at least one predefined sequence in which the sub-images are to be displayed, wherein for a given sub-image, a corresponding set of drive signals is generated to individually control the plurality of LC cells of the LC layer, based on intensity values of pixels in the given sub-image;
• send the different sets of drive signals to the drive circuit according to the at least one predefined sequence in which the sub-images are to be displayed;
• and
• control individually, via the drive circuit, the plurality of LC cells of the LC layer using the different sets of drive signals according to the at least one predefined sequence, whilst controlling the backlight unit to switch between lights of the at least two different colours according to the at least one predefined sequence in which the sub-images are to be displayed via the display device;
• the system further comprising:
• a multiscopic optical element arranged on an optical path of the display device;
• and
• at least one processor configured to:
• determine a relative location of a first eye and of a second eye of at least one user with respect to an image plane of the display device, by utilising the tracking means, wherein the given image is a light field image that is generated or retrieved based on the relative location of the first eye and of the second eye of the at least one user with respect to the image plane;
• and
• control the multiscopic optical element, based on the relative location of the first eye and of the second eye of the at least one user with respect to the image plane, to direct light corresponding to a first set of pixels and a second set of pixels of the light field image to produce a first part and a second part of a synthetic light field, respectively, for the first eye and the second eye of the at least one user,
• wherein the system further comprises an optical combiner arranged on an optical path of the display device and on an optical path of a real-world light field of a real-world environment, wherein the optical combiner is employed to reflect the first part and the second part of the synthetic light field towards the first eye and the second eye of the at least one user, whilst optically combining the real-world light field with the first part and the second part of the synthetic light field.