In order to satisfy the visual requirement of information sharing and confidential information protection, the research work mainly focuses on controllable visual angle technology applied to notebook display area, and proposes a new multi view switchable notebook display technology. The method combines backlight module with window-shades louver film, uses two cell design meaning consist of a dimming liquid crystal display (DLCD) device and a LCD display with micro lens, wide viewing mode and privacy mode can be switched by one keyboard toggle by modulating the signal of DLCD and the current of backlight. When users want to share information, it performs a sharing wide view mode. On this situation, the current of the backlight is higher and weak vertical electric field is applied to the DLCD. When it switches to a privacy mode for users to protect the display information, the current of the backlight switches to a lower state, and the vertical electric field of DLCD becomes strong. When the view angle is larger than 45° in horizontal direction, the display image is blocked well in narrow viewing angle mode. The wide view mode has the same wide view angle display characteristics as the industry wide view displays. The viewing controllable technology studied in this paper has a good application prospect in the field of anti-peep notebook display as the viewing angle can be switched freely with a high image quality and without sacrificed any aperture ratio.