| abstract |
The technology provides a dimming module (198) for a near-eye display, NED, device (14r, l) that controls an amount of ambient light (170) that passes through the transmissive near-eye display (112) to a user. The dimming module (198) includes at least one electrochromic cell (400) that enables variable density dimming so that the NED device (14r, l) may be used in an augmented reality (AR) and/or virtual reality (VR) application. The electrochromic cell (400) may be a monochrome electrochromic cell having stacked layers of a monochrome electrochromic compound layer (453a) and insulator (454a) sandwiched between a pair of transparent substrates (450a, b) and conductors (451a, b). A current may be applied to the conductor layers (451a, b) to control the amount of dimming in response to a dimming value. A NED device (14l, r) having a dimming module (198) may be included in a visor (8), or other type of head-mounted display, HMD (2). The dimming module (198) may be flat and supported by a flat waveguide mount (123) in the user's field of view. |