Patent ID: 8427734

Claim:
A 3D image display device, comprising: a display module, for generating a left-eye image and a right-eye image; an electrochromic module, including: a first transparent substrate; a first transparent conductive element, installed on a side of the first transparent substrate; a plurality of first electrochromic elements, installed on a side of the first transparent conductive element; an electrolyte layer, disposed on a side of the first electrochromic elements; a plurality of second electrochromic elements, installed on a side of the electrolyte layer; a second transparent conductive element, installed on a side of the second electrochromic elements, and the second electrochromic elements being orthogonally arranged with the first electrochromic elements; and a second transparent substrate, disposed on a side of the second transparent conductive element; a control element, electrically coupled to the first transparent conductive element and the second transparent conductive element, for switching a voltage of the first transparent conductive element and the second transparent conductive element; and a sensing element, electrically coupled to the control element, for sensing a rotating direction of the 3D image display device to transmit a sensing signal to the control element accordingly to change the color of the first electrochromic elements or the second electrochromic elements, so as to produce a parallax barrier.