OnePlus collaborated with racing and technology brand McLaren on the concept phone's design.
"The invisible camera stands as a new form of camera design, one that spares the user from the compromises of current camera layouts," said Pete Lau, CEO and Founder of OnePlus.
The price of the 'Concept One' smartphone has not been revealed yet.
"The rear camera lenses are hidden by the dynamic electrochromic glass and only become visible when the camera is in use. This optimal solution is what OnePlus calls "Electronic CMF"-a new approach in industrial design," Lau elaborated.
The glass of the OnePlus Concept One uses organic particles to create changes in transparency so that the glass covering the camera lenses can shift in an instant from opaque black to entirely clear.
According to the company, the glass also provides a practical benefit, doubling as a built-in polarizing filter for the camera that allows users to achieve sharper, more finely detailed shots under strong light.
The OnePlus Concept One draws inspiration from similar technology used in McLaren's 720S Spider luxury sports car, which features a retractable hard top glazed with an electrochromic glass panel that can rapidly switch between tinted and transparent states.
"At McLaren we select the best quality leathers produced in the UK; it's a material that exudes luxury and we are keen to offer our expertise in the design of this OnePlus concept device," said Jo Lewis, Colour and Materials Design Manager at McLaren Automotive.
Although electrochromic glass has already been put to use?in some limited applications in cars and planes, miniaturizing the technology for use in phones is the first such effort.
For 'Concept One', the glass? panels are just 0.1mm?each, for a?combined total of only 0.35mm thin as a display glass protector film.??
The company claims that Concept One takes a mere 0.7 second for the glass to transition from solid black to fully clear, faster even than the camera itself takes to fully activate.?
( With inputs from IANS )