Traditional histogram equalization distorts the
brightness enhancement by invariably shifting output mean brightness to middle gray level.
The Optovision joint venture with Chimei Innolux Corporation created in 2004 to make optical films produces, has as its main product an HOE optical
brightness enhancement film for LCD displays.
Lenovo engineers were able to accomplish this by reducing the number of bulbs used in the system from four to two, while adding new
brightness enhancement films to ensure greater operating performance.
The company is engaged in the manufacture and sale of various types of optical films for LCDs, such as polarizers, retardation film- and
brightness enhancement film-laminated polarizers, for which the company currently holds the top share of 55% in the world.
He attributes this to the use of a second-generation beam-strengthening technique called
brightness enhancement.