US Patent 10043430 Eyecup-display alignment testing apparatus

An apparatus for aligning an eyecup to an electronic display panel of a head-mounted display is presented in this disclosure. The eyecup is coupled to the electronic display panel forming an eyecup assembly. An imaging device captures one or more images of image light projected by the electronic display panel through the eyecup. A calibration controller, interfaced with the electronic display panel and the imaging device, determines physical locations of pixels of the electronic display panel on a sensor of the imaging device based on the captured one or more images. The calibration controller also determines a preferred alignment for presenting images by the electronic display panel based on the determined physical locations of the pixels and a projected location of the eyecup.