| 摘要 |
A display (22) adapted for use in head mounted display systems (20). The display (22) includes an array of reflecting pixels (32, 39, 231, 239), a first light source (35, 255) for illuminating the array of reflecting pixels (32, 39, 231, 239), and a mask screen (33) located between the light source (35, 255) and the array of reflecting pixels (32, 39, 231, 239). The mask screen (33) includes a plurality of mask elements, one mask element corresponding to each of the pixels. The mask elements have a first state in which the mask element is transparent and a second state in which the mask element is opaque. The state of the mask element is determined by a potential generated by the corresponding pixel (31, 39, 231, 239). Each of the pixels includes a reflector (38, 47, 238, 247) for reflecting light from the first light source (35, 255) into a cone having an opening angle (41, 44) and an axis (42, 43) which depends on the position of the pixel (31, 39, 231, 239) in the display (22) and on the telecentricity of the imaging optic (27). In the preferred embodiment of the present invention, each of the reflectors is an off-axis portion of a diffractive micro Fresnel mirror (100). A color display (22) is implemented by including additional light sources (254, 256) having wavelengths different from the first light source (35, 255). The additional light sources (254, 256) are spatially displaced from the first light source (35, 255) and each other to provide proper color mixing.
|
