A display unit has a brightness equal to that in a conventional black-and-white reflection type and the power consumption is small at a standby time, and bright color display of high quality can be produced and power consumption is small at the time of use. An information device having this display unit,...http://www.google.com/patents/US7038641?utm_source=gb-gplus-sharePatent US7038641 - Color/black-and-white switchable portable terminal and display unit
