Patent ID: 9612681
Date: 2017-04-04
CPC Classifications: G02B,G02F,G06F,G06T,G09G,H04N

Claim:
1. A three dimensional (3D) display apparatus, comprising: a liquid crystal optical grating located on a liquid crystal display module, wherein the liquid crystal optical grating is provided with a respective probe terminal on each of the four corners of an electrode layer thereof, for detection of an electric current value, and wherein the liquid crystal optical grating comprises a lower substrate disposed on the liquid crystal display module and an upper substrate disposed oppositely to the lower substrate, the lower substrate being provided with a plurality of lower substrate stripe-shaped electrodes arranged side by side on the surface facing the upper substrate, the upper substrate being provided with a plurality of upper substrate stripe-shaped electrodes arranged side by side on the surface facing the lower substrate, the plurality of upper substrate stripe-shaped electrodes and the plurality of lower substrate stripe-shaped electrodes being arranged perpendicular to each other, the four probe terminals located, respectively, at the four corners of the rectangular outline formed by the plurality of upper substrate stripe-shaped electrodes; and a controller signally connected with the four probe terminals, wherein the controller is used for calculation of a touch point position of a touch object on the 3D display apparatus based on the electric current values detected at the four probe terminals, wherein the 3D display apparatus is configured to: within a first time period of a preset timeframe, implement a touch screen function by grounding the plurality of lower substrate stripe-shaped electrodes and applying an alternating voltage signal to the plurality of upper substrate stripe-shaped electrodes, the alternating voltage signal being used for generating the electric current upon a touch of the touch object on the 3D display apparatus; and within a second time period of the preset timeframe, implement 1) a 3D display function in a first direction by grounding the plurality of lower substrate stripe-shaped electrodes and applying a preset voltage signal to a part of the plurality of upper substrate stripe-shaped electrodes, with the remaining part being grounded, or 2) a 3D display function in a second direction by grounding the plurality of upper substrate stripe-shaped electrodes and applying the preset voltage signal to a part of the plurality of lower substrate stripe-shaped electrodes, with the remaining part being grounded.