OPACITY FILTER FOR SEE-THROUGH HEAD MOUNTED DISPLAY

Optical see-through head-mounted display device comprising a see-through lens (108) extending between a user's eye (118) and a real-world scene (120) when the display device is worn by the user, the see-through lens (108) comprising an opacity filter (106) having a plurality of pixels, each pixel being controllable to adjust the opacity of the pixel, and a display component (112), the see-through lens (108) being mounted to a frame on which the optical see-through head-mounted display device is mounted, an augmented reality emitter (102) that emits light to the user's eye (118) using the display component (112), the light representing an augmented reality image (104), a tracking component (122) that tracks a location of the user's eye (118) relative to the frame when the display device is worn by the user, and a control circuit (100) that controls the opacity filter (106) to provide an increased opacity for pixels that are behind the shape of the augmented reality image (104) from a perspective of the user's eye (118), wherein the control circuit (100) is responsive to the location of the user's eye (118) relative to the frame.