Papers by Lakshmi Bodduluri
Recent advances in technology and the increased use of tablet computers for mobile health applica... more Recent advances in technology and the increased use of tablet computers for mobile health applications including vision testing, necessitates an understanding of the behaviour of displays of such devices in order to facilitate reproduction of existing or the development of new vision assessment tests. The purpose of this study was to investigate the physical characteristics of one model of tablet computer (iPad mini Retina display) with regards to display consistency across a set of devices (15) and their potential application as clinical vision assessment tools. Once the tablet computer was switched on, it required about 13 minutes to reach luminance stability while chromaticity remained constant. The luminance output of the device remained stable until a battery level of 5%. Luminance varied from centre to peripheral locations of the display and with viewing angle, while the chromaticity did not vary. Minimal (1%) variation observed in luminance due to temperature and, chromaticity remained constant. Also, these devices showed good temporal stability of luminance and chromaticity. All 15 tablet computers showed gamma functions approximating standard gamma (2.20) and showed similar colour gamut sizes, except for the blue primary which displayed minimal variations. The physical characteristics across the 15 devices were similar and are known, thereby facilitating the use of this model of tablet computer as visual stimulus displays.
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Papers by Lakshmi Bodduluri