Holographic liquid crystal display, stereo display method, and stereo display system

Patent metadata

Field	Value
Publication number	US-9591297-B2
Application number	US-201214128670-A
Country	US
Kind code	B2
Filing date	Nov 30, 2012
Priority date	Apr 25, 2012
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A holographic LCD stereo display system is disclosed. The holographic LCD stereo display system comprises: a holographic projection device ( 11 ), a signal synchronous generator ( 12 ) and a holographic LCD having multiple layer of LCD panels. In the system, the holographic projection device ( 11 ) decomposes a stored holographic stereo image to obtain decomposes images and projects the decomposed images to the holographic LCD ( 13 ) in sequence; the holographic LCD ( 13 ) controls, according to a synchronous signal received from the signal synchronous generator ( 12 ), the multiple layers of LCD panels to display projected decomposed images in sequence; and when a frequency at which the holographic LCD ( 13 ) displays the decomposed images is not less than 46 Hz, with visual persistence effect of human eyes, the decomposed images become real three-dimensional stereo images in human brains, so that the holographic stereo three-dimensional images are presented stereo images in the holographic LCD ( 13 ), thereby achieving an effect of vividly displaying real naked-eye three-dimensional images. Further disclosed are a holographic LCD and a stereo display method.

First claim

The invention claimed is:

1. A stereo display method for a holographic liquid crystal display (LCD), the method comprising:
receiving, by the holographic LCD, a synchronous signal, a signal frequency of the synchronous signal being a refresh frequency of projecting decomposed images obtained by decomposing a holographic stereo image;
decomposing, by a holographic projection device, the holographic stereo image to obtain the decomposed images;
projecting, by the holographic projection device, the decomposed images onto the holographic LCD sequentially; and
controlling, by the holographic LCD, multiple LCD panels to sequentially display the projected decomposed images, according to the refresh frequency,
wherein the synchronous signal carries identifier information that indicates completion of projecting all the decomposed images obtained by decomposing the holographic stereo image, or identifier information that indicates initiation of projecting the decomposed images obtained by decomposing the holographic stereo image, and
wherein the controlling, by the holographic LCD, the multiple LCD panels to sequentially display the decomposed images projected according to the refresh frequency comprises:
upon receiving any of the identifier information, determining, by the holographic LCD, a corresponding number of the LCD panels based on a number of the decomposed images that need to be displayed subsequently and belonging to the same holographic stereo image; and
controlling, by the holographic LCD, the determined LCD panels to display in sequence the decomposed images projected, according to the refresh frequency.

2. The method according to claim 1 , wherein the controlling, by the holographic LCD, the determined LCD panels to display in sequence the decomposed images projected comprises:
controlling, by the holographic LCD, one of the multiple LCD panels to display the decomposed image projected by the holographic projection device while controlling others of the multiple LCD panels of the holographic LCD to be in a fully transmissive state;
refreshing, by the holographic projection device, the decomposed images projected according to the refresh frequency; and
controlling, by the holographic LCD, the LCD panel which is currently displaying the decomposed image to enter the full transmissive state, and controlling a layer of the LCD panel behind the LCD panel which is currently displaying the decomposed image to display the decomposed image refreshed.

3. The method according to claim 1 , wherein the refresh frequency is no less than 46 Hz.

4. The stereo display method according to claim 1 , wherein a number of the multiple LCD panels is greater than a number of the decomposed images.

5. A stereo display system for a holographic LCD, the system comprising:
a holographic projection device which stores decomposed images obtained by decomposing a holographic stereo image, and projects sequentially the decomposed images; and
a holographic LCD device having multiple LCD panels, for controlling the multiple LCD panels to display in sequence the decomposed images projected, and in a refresh period, controlling only one panel of the multiple LCD panels to display the decomposed image projected and other panels of the multiple LCD panels to enter a fully transmissive state, according to a refresh frequency of a synchronous signal, at which the holographic projection device projects the decomposed images,
wherein a number of the multiple LCD panels of the holographic LCD is not less than a number of the decomposed images obtained by decomposing a holographic stereo image,
wherein the synchronous signal carries identifier information that indicates completion of projection of all the decomposed images obtained by decomposing the holographic stereo image, or identifier information that indicates initiation of projection of the decomposed images obtained by decomposing the holographic stereo image, and
wherein upon receiving any of the identifier information, based on the number of the decomposed images belonging to the same holographic stereo image that needs to be displayed subsequently, the holographic LCD determines a same number of the LCD panels as the number of the decomposed images and controls the determined LCD panels to display the decomposed images to be projected next.

6. The stereo display system according to claim 5 , wherein a number of the multiple LCD panels is greater than a number of the decomposed images.

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Yu Yangbing
• Shi Zhe

Classifications

• G09G3/002

  to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT · CPC title

• G09G3/003

  to produce spatial visual effects · CPC title

• G02F1/13471

  in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells (G02F1/13475 takes precedence) · CPC title

• G09G2300/023

  Display panel composed of stacked panels · CPC title

• G09G3/3618

  with automatic refresh of the display panel using sense/write circuits · CPC title