A micro-display device with selectively activatable backlight regions

摘要

A micro-display device 10 suitable for use in a HUD or HMD comprises a source of illumination 20 including an array of illuminating portions 22; a LCoS image generator 12 includes an array of image forming portions or pixels 16 and receives a signal 13 comprising image data 14, portions 16 are selectively activated to project image-bearing light 18 corresponding with the image data when illuminated by light 24 from the source of illumination 20. A controller 28 receives the image data 14 and selectively activates illuminating portions 22 according to the image data and according to predetermined criteria relating to heat generation or power consumption by the micro-display device.