Patent ID: 9188731
Filing Date: 2015-11-17
Classification: G02B,G02F

Abstract:
1. A directional display device, comprising: a transmissive spatial light modulator comprising an array of pixels arranged to modulate light passing therethrough; and at least two directional backlights, each comprising: in respect of each directional backlight, an array of light sources at different input positions across the input end of the respective waveguide; a control system arranged to selectively operate the light sources to direct light into said optical windows corresponding to said output directions, the control system further comprising a sensor system arranged to detect the position of an observer relative to the display device, the control system being further arranged to control the display device to display temporally multiplexed left and right images and synchronously to direct the displayed images into viewing windows in positions corresponding to left and right eyes of an observer, in dependence on the detected position of the observer.