The use of smartphone in the outdoor environment has been increased, it is hard to read the contents on the screen due to the reflection of the sunlight on the screen. For clear legibility, there are some application accessibility guidelines related t...
The use of smartphone in the outdoor environment has been increased, it is hard to read the contents on the screen due to the reflection of the sunlight on the screen. For clear legibility, there are some application accessibility guidelines related to brightness contrast. However, most of them are based on web accessibility guidelines. This study was conducted to find the best degree of brightness contrast in the outdoor environment. The result of experiment showed that when the application is designed the brightness contrast of the environment and the screen should be considered as followings : when the background color is 100%(black), 7.46:1, when the background color is 50%(Grey), 2.45:1, when the background color is 0%(White), 2.77:1.