Advantage: Exceed big screen, indication dimension of umbriferous act wall is almost OK and aleatoric size; With the tall contrast that umbriferous photograph cannot be likened to than having; Sex of an organic whole is good. Accomplish high resolution easily; Multimedia input; Representing the development way of modern indication technology.

Defect: The structure is complex, cover an area of an area bigger; Joining together is used have lack fidelity, each unit brightness consistency is poor; The perspective is a bit poor.