Readability of electronic braille lines is largely dependable of the physical quality of its housing i.e. the rigidity and straightness of the reading surface and the thermal sensation of the material. A further miniaturization of the braille cells gave space to the ultra-low architecture of the housing. Optelec requested Promea to develop concepts for their next generation of braille displays. Promea was again able to shift frontiers by applying a housing based on a laminate of carbon sheet and aluminium and an advanced production process. Also new is the tactical quality of the buttons which contributes to the perception of the functions.