The above picture and two youtube videoa show the basic design for the holographic TV.
What happens is the display and eye form a line, and the two points that make the line are the eye point and the display pixel point.
The pixel point sends light to the eye point in a straight line. What happens is the pixel point sends light onto the eye point.
In real life we see objects because light bounces off of it and then the redirected light that bounced off the object then bounces onto the eye which then percieves the object.
So in the display eye points the display acts as though light bounced on the display then the light bounced from the display and onto the eye so the eye could see the display.
In real life though, when the person looks around what it sees it sees the other side of what it's looking at, because the light is striking the viewed object 360 degrees around the object so as the person looks at the object the light is bouncing off the object at the different points the person looks at as the person walks around the object.
But in a display when the person looks around the object the tv has a diffuser that sends the same 2d imade to all points the display sends light too, so there is no 3d and no hologram because the only light that hits the eye as it moves around the object is the same light from the different places the eye looks at the display.
But if the persons eye moved around the display then the display sends light to the eye so the eye sees different reflection of light from the object the display is showing, this is 3d and a hologram.
So the principle of the 3d I am describing in the display is the line sends light to the eye and the eye is in one xy axis position. But when the eyes xy axis position changes the display sends light to the eye so the eye sees light from the object in the display from a different part of the object being looked at.
How does the display sends light to the eye based on the eyes position so the effect is the eye recieves light from the object being looked at from the new view of what the eye is looking at?