Digital apparatus for convergence correction

Abstract

Abstract Digital apparatus for convergence correction of a plurality of images on the screen of a television monitor includes a digital registration circuit, or an analog registration circuit using a digital attenuator; and a memory for storing data for operation of the digital registration circuit or the digital attenuator of the analog registration circuit. The memory has a plurality of pages, and the correction data corresponding to different operating conditions is stored in the respective pages of the memory. The paging of this memory is performed in accordance with the operating conditions, and the convergence correction is carried out on the basis of the correction data continuously read out of the designated page. With this apparatus, accurate convergence adjustment can be simply performed to accommodate changes in size and/or shape of the image displayed on the screen or monitor, changes in the distance of a projection screen from its projector, and changes in the screen surface, i.e., flat, concave, cyindrical, etc.

Inventors

• 👤 Naotaka Ando
• 👤 Kazuhiko Takabayashi

Bibliographic Details