Nov 15, 2017: GL Vision, South Korean small and medium company, has developed Quantum Dot Enhancement Film (QDEF) technology that can make quantum dot (QD) TV less expensive and thinner. The technology is resistant against heat, water, and air contact. It does not require a barrier film that is usually attached to QD TV to protect QD material.
The company has also mass-produced QD lighting with improved color rendering by attaching QDEF to LED lighting as it is resistant against heat. QDEF can be made without using a barrier film. GL Vision is currently developing QDEF for heat-resisting displays that do not require barrier films. Barrier film protects QD from oxygen and water. It protects it from oxygen and water contact by breaking up quantum dot into resin and making it into a sheet and covering it with two barrier films.
However barrier film has high degree of technical difficulty and is expensive as it is responsible for about 20 to 30% of QDEF price. Barrier film is about $30.
GL Vision developed stable QD material that is not affected by heat, water, and oxygen, and can be applied to QD lighting. It is currently developing QDEF that has higher color representation power by attaching QD material to current LCDs.
It first developed QD powder by applying its own technologies to QD material that is in a form of solution. It also manufactured QD film and QD pellet for lighting by using this QD powder. QD lighting can be made by either attaching QD film to LED lighting or putting QD pellet into LED modules.
While color rendering of LED lighting is usually between 79 and 80Ra, LED lighting with QD pellet increases color rendering up to 95Ra. Since there is possibility of emission of QD pellet from its characteristic of being resistant against heat, it can be used for lighting and it can prevent glare and reduces degree of fatigue of eyes.
Since QD lighting has higher color rendering and color representation power than regular LED lighting, it is good for indoor down-light or industrial lighting that needs to accurately understand color.
The company is currently discussing with South Korean and foreign companies regarding supply of QD lighting. The company expects to increase added values in LED lighting through QD material with higher stability.