US 2026/0086385 A1 · OPTICAL DEVICE AND LUMINANCE AND COLOR COMPENSATION METHOD

Abstract

An optical device includes a display device emitting a light and a polarization rotator. The polarization rotator is disposed in front of a light emitting surface of the display device. The polarization rotator includes a wave plate assembly and a back polarizer. The wave plate assembly includes a first quarter-wave plate having an optical axis oriented at a first angle, a first half-wave plate having an optical axis oriented at a second angle, and a second quarter-wave plate having an optical axis oriented at a third angle, in which the first half-wave plate is between the first quarter-wave plate and the second quarter-wave plate, and the second angle is different from the first angle and the third angle. The wave plate assembly is optically coupling between the back polarizer and the display device.

Claims20

Dependent claims

An optical device, comprising:

a display device emitting a light;
and
a polarization rotator disposed in front of a light emitting surface of the display device and comprising:
a wave plate assembly comprising:
a first quarter-wave plate having an optical axis oriented at a first angle;
a first half-wave plate having an optical axis oriented at a second angle;
and
a second quarter-wave plate having an optical axis oriented at a third angle, wherein the first half-wave plate is between the first quarter-wave plate and the second quarter-wave plate, and the second angle is different from the first angle and the third angle;
and
a back polarizer, wherein the wave plate assembly is optically coupling between the back polarizer and the display device.

7 more elements

A luminance and color compensation method, adapted to an optical device comprising a display device and a polarization rotator in front of a light emitting surface of the display device, wherein the polarization rotator has a first rotator area and a second rotator area, the display device comprises a backlight module and a display panel, and the backlight module comprises a first backlight area corresponding to the first rotator area of the polarization rotator and a second backlight area corresponding to the second rotator area of the polarization rotator, the method comprising:

emitting a light from the backlight module to the display panel, wherein the first backlight area of the backlight module has a first backlight luminance and the second backlight area of the backlight module has a second backlight luminance different from the first backlight luminance;
and
directing the light from the display panel to the polarization rotator, wherein the light exiting the polarization rotator has a first luminance in the first rotator area of the polarization rotator and has a second luminance in the second rotator area of the polarization rotator, wherein a ratio of a difference between the first luminance and the second luminance to the first luminance is less than a ratio of a difference between the first backlight luminance and the second backlight luminance to the first backlight luminance.

Dependencies are inferred from the claim text.

Optical device and luminance and color compensation method

Life of this patent

Optical device and luminance and color compensation method

Life of this patent

Abstract

Claims20