Polarization control module, optical module and display device

Abstract

This application provides a polarization control component, including a first phase retarder and a second phase retarder. The optical axis of the first phase retarder is perpendicular to its thickness direction. The optical axis of the second phase retarder forms an angle of 70° to 110° with the optical axis of the first phase retarder, including the endpoint values. The optical axis of the second phase retarder does not coincide with the thickness direction of the first phase retarder. This application also provides an optical component and a display device.

Claims

1. A polarization control component, improved in that it comprises: A first phase retardation film, wherein the optical axis of the first phase retardation film is perpendicular to the thickness direction of the first phase retardation film; The system includes a second phase retarder, the optical axis of which forms an angle of 70° to 110° with the optical axis of the first phase retarder, including the endpoints; the optical axis of the second phase retarder does not coincide with the thickness direction of the first phase retarder; and the polarization control component satisfies the following relationship: 0.25λ≤Δn1×d1+Δn2×d2<0.3λ, and Δn1×d1≠Δn2×d2; where Δn1 is the birefringence of the first phase retarder, d1 is the thickness of the first phase retarder, Δn2 is the birefringence of the second phase retarder, d2 is the thickness of the second phase retarder, and λ is the wavelength of the light received by the polarization control component.

2. The polarization control assembly as described in claim 1, wherein, The optical axis of the second phase retarder is at an angle of 0 to 10° to the thickness direction of the first phase retarder.

3. The polarization control assembly as described in claim 1, wherein, The first phase delay plate is used to transmit circularly polarized light and change the polarization state of the circularly polarized light.

4. The polarization control assembly as described in claim 1, wherein, The polarization control component further includes an adhesive layer located between the first phase delay sheet and the second phase delay sheet, for connecting the first phase delay sheet and the second phase delay sheet.

5. The polarization control assembly as described in claim 1, wherein, Both the first phase retardation sheet and the second phase retardation sheet comprise a complex number of positive rod-shaped liquid crystal molecules.

6. An optical component, improved in that it comprises: A lens for receiving and converging circularly polarized image light; a polarization control component as described in any one of claims 1 to 5 for changing the polarization state of the image light to a linear polarization state; a reflective polarizer located in the optical path from which the image light is emitted by the polarization control component for reflecting the image light from the polarization control component back to the polarization control component; and a linear polarizer located in the optical path from which the image light is emitted by the reflective polarizer for receiving and transmitting the image light to the outside of the optical component.

7. The optical component as claimed in claim 6, wherein, The first phase retarder is located between the lens and the second phase retarder, or the second phase retarder is located between the lens group and the first phase retarder.

8. The optical component as claimed in claim 6, wherein, The polarization control component is also used to transmit image light from the reflective polarizer to the lens, and the lens is used to partially reflect the image light from the polarization control component back to the polarization control component, so that the image light passes through the polarization control component, the reflective polarizer and the linear polarizer in sequence and then exits to the outside of the optical component.

9. A display device, improved in that it comprises: A display used to emit light for images; And an optical component as described in any one of claims 6 to 8, located on the side of the display from which the image light is emitted, for receiving the image light and folding the optical path of the image light before emitting it.

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