US 2025/0028196 A1 · Display Device Having Switchable Viewing Angle

Abstract

A display device having a switchable viewing angle includes a first polarizer which transmits light of a P-wave or S-wave, a viewing angle control panel which is disposed above the first polarizer, includes a lower electrode and an upper electrode, and a liquid crystal layer disposed between the lower electrode and the upper electrode to selectively change the light of P-wave or S-wave to an S-wave or P-wave, and a second polarizer which is disposed above the viewing angle control panel and has a transmission axis perpendicular to a transmission axis of the first polarizer. Therefore, the mode may be switchable to the privacy mode and the share mode and in the share mode, the luminance may be improved without increasing the power consumption.

Claims20

Dependent claims

A display device having a switchable viewing angle, comprising:

a backlight unit configured to provide polarized light of a P-wave or S-wave;
a first polarizer which is disposed above the backlight unit and has a transmission axis that matches the polarized light of the backlight unit and transmits light of the P-wave or the S-wave;
a viewing angle control panel above the first polarizer, the viewing angle control panel includes a lower electrode, an upper electrode, and a liquid crystal layer between the lower electrode and the upper electrode, the liquid crystal layer selectively changing the light of the P-wave to the S-wave or the S-wave to the P-wave;
and
a second polarizer above the viewing angle control panel, the second polarizer having a transmission axis perpendicular to the transmission axis of the first polarizer.

2 more elements

A display device having a switchable viewing angle, comprising:

a first polarizer that transmits light of a P-wave or S-wave;
a viewing angle control panel above the first polarizer and including a lower electrode, an upper electrode, and a liquid crystal layer between the lower electrode and the upper electrode, the viewing angle control panel configured to selectively change the light of the P-wave to the S-wave or the S-wave to the P-wave;
a third polarizer above the viewing angle control panel, the third polarizer having a transmission axis perpendicular to a transmission axis of the first polarizer;
a first substrate above the third polarizer;
a second substrate which is opposite to the first substrate;
another liquid crystal layer between the first substrate and the second substrate;
and
a fourth polarizer outside of the second substrate, the fourth polarizer having a transmission axis perpendicular to a transmission axis of the third polarizer.

5 more elements

Dependencies are inferred from the claim text.

Display Device Having Switchable Viewing Angle

Life of this patent

Display Device Having Switchable Viewing Angle

Life of this patent

Abstract

Claims20