Comparative Study of Visible Light Spectra Emitted by LCD and OLED Screens of Mobile Gadgets
Comparative Study of Visible Light Spectra Emitted by
LCD and OLED Screens of Mobile Gadgets
Dirabel Faith Alveza1*, Franzielle Marie Conde2, Nereo Joshua Pecson3 and Pauline Villacorta1
1
National Institite of Geological Sciences, University of the Philippines, Diliman, Quezon City
2
Department of Chemical Engineering, College of Engineering, University of the Philippines, Diliman,
Quezon City
3
Department of Geodetic Engineering, College of Engineering, University of the Philippines, Diliman,
Quezon City
*Corresponding author: dira.alveza@gmail.com
Abstract
This study aims to observe and determine the visible light spectra emitted by OLED and LCD (Retina Display and IPS) screens, compare them with each other, and identify the effect of brightness in the spectrum. A handheld spectrometer was used to observe the spectral lines of red, orange, yellow, green, blue, violet, and white in the 3 types of screens. By digitizing the data obtained, the results for the screens were compared. All the screens emitted continuous light spectra with varying range: IPS having the widest, and LED and Retina having a similar range. Screen brightness did not have significant effects on the spectral lines.
Keywords: visible spectrum, spectral lines, LED, IPS, Retina display 1. Introduction
Light sources emit a spectrum of different colors. The colors visible in the spectrum have different values of wavelengths. Electrons of atoms occupy specific orbital configuration for different energy levels. If the atoms are disturbed by an electromagnetic wave, the atoms absorb energy which is expressed as
LCD and OLED Screens of Mobile Gadgets
Dirabel Faith Alveza1*, Franzielle Marie Conde2, Nereo Joshua Pecson3 and Pauline Villacorta1
1
National Institite of Geological Sciences, University of the Philippines, Diliman, Quezon City
2
Department of Chemical Engineering, College of Engineering, University of the Philippines, Diliman,
Quezon City
3
Department of Geodetic Engineering, College of Engineering, University of the Philippines, Diliman,
Quezon City
*Corresponding author: dira.alveza@gmail.com
Abstract
This study aims to observe and determine the visible light spectra emitted by OLED and LCD (Retina Display and IPS) screens, compare them with each other, and identify the effect of brightness in the spectrum. A handheld spectrometer was used to observe the spectral lines of red, orange, yellow, green, blue, violet, and white in the 3 types of screens. By digitizing the data obtained, the results for the screens were compared. All the screens emitted continuous light spectra with varying range: IPS having the widest, and LED and Retina having a similar range. Screen brightness did not have significant effects on the spectral lines.
Keywords: visible spectrum, spectral lines, LED, IPS, Retina display 1. Introduction
Light sources emit a spectrum of different colors. The colors visible in the spectrum have different values of wavelengths. Electrons of atoms occupy specific orbital configuration for different energy levels. If the atoms are disturbed by an electromagnetic wave, the atoms absorb energy which is expressed as
References: Dunn, M. (2014, August 29). AMOLED vs LCD: Which screen is best for your phone?. Retrieved October 7, 2014, from Digital Trends:http://www.digitaltrends.com/mobile/amoledvslcd-which-screen-is-best-for-your-phones 3. Soneira, Raymond. (2013). Mobile LCD and OLED Display Shoot-Outs: In-Depth Testing, Measurements, and Analysis of Smartphone, Smart Watch, and Tablet Displays November 20, 2014, from http://www.displaymate.com/ 4