HIGH PRECISION CONTRAST RATIO DISPLAY FOR VISUAL STIMULUS
摘要
<p>Embodiments of the present invention include approaches for controlling light valve devices to improve the range and precision of the contrast ratio and the grayscale levels of a display used for visual field tests. In one embodiment, two or more illumination devices are used to enable the display device to display a wide range of contrast stimuli at precise illumination intensities over a fixed background illumination level. In another embodiment, the gamma curves of the display elements are adjusted to allow greater variations in the brightness of the display.</p>
申请公布号
WO2010066420(A3)
申请公布日期
2010.08.19
申请号
WO2009EP08820
申请日期
2009.12.10
申请人
CARL ZEISS MEDITEC AG;WANG, YINGJIAN;JOHANSSON, GOERAN, A.