41.3: Evaluating the Effects of Environmental Illuminance on the Readability of E‐books

Koizuka, Tatsuya; Sano, Shunta; Kojima, Takehito; Miyao, Masaru

doi:10.1002/j.2168-0159.2013.tb06273.x

Cited by 7 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the evaluations for the backlit LCD were comparable in score to that for the paper text at 1,000 lx illuminance condition, while the best rating at 3,000 lx illuminance was obtained with the paper text. This result was similar to that of our previous study 1) . This study confirmed the superiority of built-in light systems under illuminance conditions of less than 1,000 lx compared to reflective devices, which was also similar to our previous study under illuminance conditions of less than 750 lx 2) .…”

Section: Discussionsupporting

confidence: 93%

The Effects of Ambient Illuminance and Aging on the Evaluation of the Readability of E-paper

Matsunami

Koizuka

Lege

et al. 2015

Eizo Joho Media Gakkaishi

Self Cite

View full text Add to dashboard Cite

The subjects for this study were 58 healthy males and females between the ages of 13 and 82 years (M 46.8, SD 16.6). Subjects who usually wore glasses or contact lenses used them for the experiments. The subjects were divided into four groups by age: young (29 years and younger), middle-aged (30 to 44 years old), senior middle-aged (45 to 64 years old), and elderly (65 years and older). The young group had sufficient amplitude of accommodation. The middle-aged group had sufficient near vision ability, although their accommodation was slightly weak. The senior middle-aged group had mild presbyopia and problems in near vision work. The elderly group had typical presbyopia and generally had to wear near vision glasses. Table 1 shows the number of subjects divided into age groups. We obtained informed consent from all subjects and approval for the study from the Ethical Review Board of the Graduate School of Information Science at Nagoya University. 2.2 Experimental design We carried out the experiment under six levels of illuminance (10 lx, 30 lx, 100 lx, 300 lx, 1,000 lx, and 3,000 lx) using a 6500 K LED light source with a fluorescent lamp having a uniform color temperature in a darkened room. The headrest for the subject's forehead, which was on the lighting system, was kept at a visual distance of 40 cm. We created the lightning system with reference to a previous study 3). The subjects looked at devices at an angle of about 100 degrees. We put the reading devices into the lighting system placed on a desk (Figure 1). We used two types of e-paper, an

show abstract

Section: Discussionsupporting

confidence: 93%

The Effects of Ambient Illuminance and Aging on the Evaluation of the Readability of E-paper

Matsunami

Koizuka

Lege

et al. 2015

Eizo Joho Media Gakkaishi

Self Cite

View full text Add to dashboard Cite

show abstract

“…For all contrast ratios, the subjective evaluation of paper was higher than that of the ILU-EPD. These results were consistent with previous experiments [8]. For the ILU-EPD and EPD, the subjective evaluations at the High level were higher than that of the Medium level.…”

Section: Exp 3 (Character Size)supporting

confidence: 93%

57-1:Invited Paper: Measurement of Readability of E-paper

Miyao

Ishio

Takahashi³

et al. 2016

SID Symposium Digest of Technical Papers

Self Cite

View full text Add to dashboard Cite

This study sought to verify the readability of e-paper devices under various conditions. The experimental conditions included various stages of illuminance, different font sizes, and different contrasts. More than 100 participants participated in the experiments from the young to the elderly. The subjects read and compared the e-paper, backlit LCD, and conventional paper under the various conditions.

show abstract

“…In contrast, most of tablet devices have a backlit LCD. Out previous study showed that under conditions of low illuminance, the readability of the e-paper is poor [1]. However, a built-in light system would improve the readability of the e-paper under low illuminance conditions (e.g.…”

Section: Introductionmentioning

confidence: 99%

59.2: The Contributions of Built‐in Light on the Readability in E‐paper Devices

Koizuka

Ishii

Kojima

et al. 2014

Symp Digest of Tech Papers

Self Cite

View full text Add to dashboard Cite

In recent years, e-readers have spread to many countries. Most of e-readers have a reflective type of display called e-paper. The general view is that under conditions of low illuminance, readability of the e-paper display is poor. However, most recent e-readers have a built-in light system. This system would improve the readability of the e-paper display under low illuminance conditions. We carried out experiments to evaluate the readability e-paper devices using different systems. In the experiments, we conducted subjective evaluations under staged illuminance conditions by using English words. This study found that e-paper devices with built-in light under low illuminance condition were superior in terms of readability.

show abstract

41.3: Evaluating the Effects of Environmental Illuminance on the Readability of E‐books

Cited by 7 publications

References 4 publications

The Effects of Ambient Illuminance and Aging on the Evaluation of the Readability of E-paper

The Effects of Ambient Illuminance and Aging on the Evaluation of the Readability of E-paper

57-1:Invited Paper: Measurement of Readability of E-paper

59.2: The Contributions of Built‐in Light on the Readability in E‐paper Devices

Contact Info

Product

Resources

About