US 2019/0196236 A1 · VIEWING ANGLE SWITCHABLE DEVCIE AND VIEWING ANGLE SWITCHABLE DISPLAY MODULE

Abstract

A viewing angle switchable device including an absorptive polarizer, a reflective polarizer and an electrically controlled viewing angle switching element is provided. A transmission axis of the reflective polarizer is parallel to a transmission axis of the absorptive polarizer. The electrically controlled viewing angle switching element is disposed between the absorptive polarizer and the reflective polarizer and includes two transparent substrates, two transparent conductive layers and a liquid crystal layer including a plurality of liquid crystal molecules. When there is a potential difference between the two transparent conductive layers, an orthogonal projection of an optical axis of each of the plurality of liquid crystal molecules on the absorptive polarizer is parallel to or perpendicular to the transmission axis of the absorptive polarizer and the transmission axis of the reflective polarizer. A viewing angle switchable display module including the viewing angle switchable device is also provided.

Claims27

Dependent claims

A viewing angle switchable device, comprising:

an absorptive polarizer;
a reflective polarizer, disposed at a side of the absorptive polarizer, wherein a transmission axis of the reflective polarizer is parallel to a transmission axis of the absorptive polarizer;
and
an electrically controlled viewing angle switching element, disposed between the absorptive polarizer and the reflective polarizer and comprising two conductive layers and a liquid crystal layer disposed between the two conductive layers,
wherein the liquid crystal layer comprises a plurality of liquid crystal molecules, and when there is a potential difference between the two conductive layers, an orthogonal projection of an optical axis of each of the plurality of liquid crystal molecules on the absorptive polarizer is parallel to or perpendicular to the transmission axis of the absorptive polarizer and the transmission axis of the reflective polarizer.

2 more elements

A viewing angle switchable display module, comprising:

a display panel;
and
a viewing angle switchable device, disposed on a display surface of the display panel and comprising:
an absorptive polarizer;
a reflective polarizer, disposed at a side of the absorptive polarizer, wherein a transmission axis of the reflective polarizer is parallel to a transmission axis of the absorptive polarizer;
and
an electrically controlled viewing angle switching element, disposed between the absorptive polarizer and the reflective polarizer and comprising two conductive layers and a liquid crystal layer disposed between the two conductive layers,
wherein the liquid crystal layer comprises a plurality of liquid crystal molecules, and when there is a potential difference between the two conductive layers, an orthogonal projection of an optical axis of each of the plurality of liquid crystal molecules on the absorptive polarizer is parallel to or perpendicular to the transmission axis of the absorptive polarizer and the transmission axis of the reflective polarizer.

5 more elements

Dependencies are inferred from the claim text.

Viewing angle switchable devcie and viewing angle switchable display module

Life of this patent

Viewing angle switchable devcie and viewing angle switchable display module

Life of this patent

Abstract

Claims27