| 摘要 |
A projection display device comprises a reflective mirror (101) for reflecting emergent light of a projection lens, and a reflective mirror dust removal apparatus, wherein the reflective mirror dust removal apparatus comprises a high pressure generation power supply (2043), a high pressure electrode and an air channel. When the projection display device is not in operation, the reflective mirror dust removal apparatus generates a high pressure to ionize the air in a front air channel of the reflective mirror, and the air ionized into a positive ion and a negative ion can absorb dust with a positive charge and a negative charge, thereby producing the technical effect of removing dust without wiping, and avoiding the problem of damage to a mirror surface of the reflective mirror that may be caused due to wiping the reflective mirror. |
