DEVELOPMENT OF MULTICOLOURED PRIMARY LIGHT IN PROJECTION SYSTEM WITH APPLICATION OF LED Russian patent published in 2012 - IPC H04N9/31 G03B21/00 

FIELD: information technologies.

SUBSTANCE: regular red primary source (22, 23) of light in the system (10) of projection display is added to a source (23) of amber light. Green (21) and blue (20) primary sources of light are also provided. All sources of light are light-emitting diodes (LED) of high capacity. The specific composition of red and amber light is achieved by variation of durations of red LED and amber LED connection. If the displayed RGD image may be created using a higher percentage of amber light and a lower percentage of red light, duration of amber LED connection increases, while duration of red LED connection reduces. Light/pixel modulators (14, 15, 16) for development of a full-coloured image from, three primary sources of light are controlled for compensation in case with the variable amber/red composition. This methodology improves efficiency of the projection system and creates lower heating. Additional increase in luminosity may be achieved by control of the light composition from the green and blue LED (46), as the primary source of light, and/or by means of control of the light composition from the blue and moderately blue LED (58), as the primary source of light.

EFFECT: increased efficiency of the light source at light-emitting diodes in the projection display.

27 cl, 8 dwg