Abstract: Methods and systems are described for illumination in different applications. Real thin illumination systems (200) with good luminance uniformity, good efficiency and good colour mixing uniformity are obtained, even if different light sources emitting different colours are used. A plurality of light sources (102), emitting light from different colours, couple their light sideways, i.e. substantially parallel to the plane of light out-coupling, into a light guide (104) through recesses (108) distributed over the light guide (104). Providing a specially structured surface pattern (106), in combination with light in-coupling parallel to the plane of light out-coupling of the light guide (104) allows to obtain a good colour mixing of the differently coloured light originating from the plurality of light sources (102). The light then is only coupled out after it has been in the light guide (104) for a significant long time such that the light emanating from different light sources (102) is significantly mixed.

Abstract: The present invention relates to a system and method for real time correction of light output and/or colour of an image displayed on a display device. The system comprises: a display device (1) comprising an active display area (6) for displaying the image, an image forming device (2) and an electronic driving system (4) for driving the image forming device (2), an optical sensor unit (10) comprising an optical aperture (21) and a light sensor (22) having an optical axis, to make optical measurements on a light output from a representative part of the active display area (6) of the image forming device (2) and generating optical measurement signals (11) therefrom, a feedback system (12) receiving the optical measurement signals (11) and on the basis thereof controlling the electronic driving system (4).

Abstract: The present invention relates to a system and method for real time correction of light output and/or color of an image displayed on a display device. The system comprises: a display device (1) comprising an active display area (6) for displaying the image, an image forming device (2) and an electronic driving system (4) for driving the image forming device (2), an optical sensor unit (10) comprising an optical aperture (21) and a light sensor (22) having an optical axis, to make optical measurements on a light output from a representative part of the active display area (6) of the image forming device (2) and generating optical measurement signals (11) therefrom, a feedback system (12) receiving the optical measurement signals (11) and on the basis thereof controlling the electronic driving system (4).

Abstract: The present invention relates to a system and method for real time correction of light output and/or colour of an image displayed on a display device. The system comprises:a display device (1) comprising an active display area (6) for displaying the image, an image forming device (2) and an electronic driving system (4) for driving the image forming device (2), an optical sensor unit (10) comprising an optical aperture (21) and a light sensor (22) having an optical axis, to make optical measurements on a light output from a representative part of the active display area (6) of the image forming device (2) and generating optical measurement signals (11) therefrom, a feedback system (12) receiving the optical measurement signals (11) and on the basis thereof controlling the electronic driving system (4).

Abstract: The present invention relates to a system and method for real time correction of light output and/or colour of an image displayed on a display device.