Cell type parallax-barrier and stereoscopic image display apparatus using the same
View Patent ↗A parallax-barrier comprises a Liquid-Crystal layer (LC layer) including pixels that form a barrier according to a control method. A controller controls the pixels of the LC layer to form a barrier pattern, by turning pixels on or off according to the control method. A lower layer is formed between the LC layer and a display module to dispose the LC layer and controller at a position off the display module by a predetermined distance. An upper layer is formed on the LC layer to dispose the LC layer and controller, and a polarizer on the upper layer, and visualizing the barrier according to the barrier pattern on the LC layer by controlling polarization angle of the light. The light passes through the lower layer, LC layer and upper layer. Stereoscopic images that are rotated in the horizontal/vertical direction can be displayed using the parallax-barrier and stereoscopic image.
1. A stereoscopic image display apparatus comprising:
a display module for displaying image contents; and
a parallax-barrier module formed in front of the display module and including a plurality of cells in a matrix structure, each of the cells being distinguished by cell gaps therebetween, wherein the parallax-barrier module is capable of converting between 2D mode and 3D mode,
wherein the cells are turned off when the parallax-barrier module is in 2D mode,
wherein the parallax-barrier module in 3D mode is capable of forming a plurality of barriers in vertical direction having a width “a” and forming a plurality of gaps between each of the barriers in vertical direction having a width “b” in a first state, wherein “a” is different from “b”,
wherein the parallax-barrier module in 3D mode is capable of forming a plurality of barriers in horizontal direction having a height “c” and forming a plurality of gaps between each of the barriers in horizontal direction having a width “d” in a second state, wherein “c” is different from “d”.
2. The stereoscopic image display apparatus of claim 1 , wherein:
the display module comprises a thin film transistor liquid crystal display; and
the parallax-barrier module comprises a twisted nematic liquid crystal display.
3. The stereoscopic image display apparatus of claim 1 , wherein:
the display module comprises organic light emitting diodes; and
the parallax-barrier module comprises one of a twisted nematic liquid crystal display and a super-twisted nematic liquid crystal display.
4. The stereoscopic image display apparatus of claim 1 , wherein the parallax-barrier module is controlled by four terminals, wherein:
one of the four terminals has a different input from other three terminals in the first state; and
another one of the four terminals has a different input from other three terminals in the second state.
5. The stereoscopic image display apparatus of claim 4 , wherein the four terminals comprise:
a first segment terminal;
a second segment terminal;
a first common terminal; and
a second common terminal,
wherein the first segment terminal is connected to odd-numbered cells in vertical direction among the cells, the second segment terminal is connected to even-numbered cells in vertical direction among the cells, the first common terminal is connected to odd-numbered cells in horizontal direction among the cells, and the second common terminal is connected to even-numbered cells in horizontal direction among the cells.