-We present a feasible modeling method to estimate the proper curvature for large-sized curved TVs. We especially focused on two factors -preference and perceived distortion -to be considered to determine the proper curvature. The preference includes a number of advantages that people expect to fulfill the possibilities of a more immersive image and sense of realism from curved display. On the other hand, the perceived distortion means the side effects that people can notice uncomfortable feeling caused by the shape of a curved one. In order to find out how two factors would be different as a number of conditions like curvature, size, and viewing angle change, a series of subjective assessments were conducted. The evaluation results show that both the preference and perceived distortion vary with the conditions considerably. We performed the statistical analysis based on the results and proposed the quantification model of proper curvature, which has higher preference and less perceived distortion, for various-sized curved TVs.Keywords -curved display, curvature.
DOI # 10.1002/jsid.3481 Objective and background TV manufacturers have come out with curved TVs, which have various sizes and curvatures on the market over the last year or so. Because the field of view of a curved screen is larger than that of a flat one as shown in Fig. 1, the TV manufactures have assured that curved one can give better visual experiences.Earlier studies have reported the effect of curved screen, which seems to support the opinion of the TV manufacturers. The study of Schulte-Pelkum and coworkers 1 shows that curved screen enhances the human perception compared with a flat one. Park et al.2 conducted the ergonomic evaluation to investigate the influences of curvature on legibility and visual fatigue. The experiment results imply that curved display can lead to better legibility compared with a flat one; on the other hand, physiological visual fatigue is also induced with curved display. Shupp et al.3 presented that curved displays improve the performance of tasks over flat displays. The interesting point of these studies is that they regarded a curved display as a tool for information acquisition, not a device for entertainment like TV. However, our previous work 4 has conducted a series of evaluations to explore the preferred curvature of curved TVs in consideration of ergonomics and TV viewing conditions. The evaluations were performed using curved screens that have three sizes (65, 86, and 120 in.) and four curvatures (flat, 3000R, 4000R, and 5000R). We asked participants both positive and negative aspects that people can find out important factors from curved displays, namely, preference and perceived distortion. The results of evaluations show that preference of each curvature is not a distinct difference among the same-sized screens; on the other hand, test subject group perceived the distortion significantly as the curvature of screen increases (Fig. 2).From the experiment results, we found that not only preference but ...
