Horizontal correcting device for projected image

The invention discloses a horizontal correcting device for a projected image. The horizontal correcting device is characterized in that a CCD camera is arranged in the correcting device; after the projected image is collected by the CCD camera, the projected image is sent to an embedded type processor for processing; and after a horizontal angle of the projected image is judged by the embedded type processor, a DMD chip on a DLP circuit board is driven to rotate by a rotating stepping motor under the driving of a motor driving circuit. With such a structure, the horizontal correcting device can achieve a horizontal correcting function without regular calibration in a use process, and meanwhile, the horizontal correcting precision is not influenced following the increasing of the use time. 本发明公开了种投影图像水平校正装置，其特征在于：所述的校正装置内设有CCD摄像头采集投影画面后送入嵌入式处理器进行处理，嵌入式处理器判断投影图像的水平角度后通过电机驱动电路驱动旋转步进电机带动DLP电路板上的DMD芯片转动。由于采用上述的结构，本发明在使用的过程中不需要进行定期的校准就可以完成水平矫正的功能，而且随着使用时间的增加，水平矫正的精度也不会受到任何影响。