3d display device and sensing method for 3d display device

A three dimensional, 3D, display apparatus comprising:

• a 3D display panel arranged to form a 3D display image;
• a touch sensing layer provided at a light-out side of the 3D display panel, wherein, the touch sensing layer comprises a capacitive screen and a glass substrate;
• wherein the glass substrate is laid on the capacitive screen, and the capacitive screen is arranged to sense a touch operation of an operating body on a surface of the glass substrate to generate a first sensing signal, and sense a stereo operation of the operating body at a predefined distance outside the glass substrate to generate a second sensing signal;
• and
• a driver chip arranged to determine an operation command of the touch operation on the image displayed on the 3D display panel according to the first sensing signal to change the image of the 3D display panel, and also arranged to determine an operation command of the stereo operation on the image displayed on the 3D display panel according to the second sensing signal to change the image of the 3D display panel.