At present, many companies played trick with concept of LED backlighting displays and LED displays. As a matter of fact, they are completely different applications. Another confusable LED technology is OLED. How to distinguish these three types of LED technologies?
LED displays directly use LED Lights as pixel components. These LEDs will be arranged in matrix, sending out red/green/blue rays to comprise color screens. Thank to the “oversized” LED, the distance between pixels (known as dot pitches) of the same color is also oversized. In another word, LED displays are only suitable for large screens.
LED display is a combination of micro-electronic technology, computer technology and information processing, having many advantages: colorful, wide dynamic range, high light intensity, long service life, stable working condition, etc. Due to these advantages LED panel displays quickly became the most popular public media. Currently, LED displays have been widely used in many places: large plazas, commercial advertisements, stadiums, press releases, stock exchanges, etc.
LED backlighting displays just replace traditional CCFL backlighting source of LCDs with LEDs. LCDs working principles can be simplified as: liquid crystal molecules deflect under external voltage as small gate for lighting sources, changing the transmittance of rays. These rays then project on the different color filters to form a complete picture.
Backlighting module’s transformation from CCFL to LED brought a lot merits to LCDs: more evenly distributed light, less power consumptions, more fashioned appearance. However, the majority of LED backlighting displays on the market used White LEDs. These are no other changes except for lighting sources. The display effect of this kind of devices is much worse than that of RBG-LED displays. The later failed to widely spread in the market due to its high cost. Thus these White LED backlighting displays and LED Street Lights are essentially different from normal LED displays and cannot be considered as one thing. Nowadays, there are more than 100 research institutions and enterprises has involved into this area, including SAMSUNG, LG, Philips, Sony, etc.
OLED is the abbreviation of Organic Light-Emitting Diode. As a matter of fact, the principle has been discovered in 1936. But until 1987, Kodak introduced a new OLED double-layer device. Since then, OLED has generally comes into our sight. OLED is a brand new flat panel display technology which can be commercialized.