Polarization beam splitter, backlight module and liquid crystal display apparatus
First Claim
1. A polarization beam splitter comprising:
- a second prism group and a first prism group formed sequentially from a light incidence side to a light outgoing side and meshing with each other; and
a polarization beam splitting layer arranged on a meshing surface of the first prism group or the second prism group and configured to allow a first polarized light in an incident light to be transmitted through the polarization beam splitting layer to exit from the light outgoing side while reflecting a second polarized light in the incident light back to the light incidence side, the second polarized light having a polarization direction perpendicular to that of the first polarized light, wherein all of prisms in the first prism group and the second prism group have triangular sections, and wherein base angles of all of the prisms in the first prism group and the second prism group are substantially equal to a Brewster'"'"'s angle for the incident light being incident onto an interface of the polarization beam splitting layer from the second prism group; and
wherein the polarization beam splitting layer has a multi-film composite structure composed of glass, TiO2 and SiO2.
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Accused Products
Abstract
The present disclosure provides a polarization beam splitter, a backlight module and a liquid crystal display apparatus. The polarization beam splitter comprises a second prism group and a first prism group formed sequentially from a light incidence side to a light outgoing side and meshing with each other; and a polarization beam splitting layer arranged on a meshing surface of the first or second prism group and configured to allow a first polarized light in an incident light to be transmitted through the polarization beam splitting layer to exit from the light outgoing side while reflecting a second polarized light in the incident light back to the light incidence side, the second polarized light having a polarization direction perpendicular to that of the first polarized light.
7 Citations
14 Claims
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1. A polarization beam splitter comprising:
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a second prism group and a first prism group formed sequentially from a light incidence side to a light outgoing side and meshing with each other; and a polarization beam splitting layer arranged on a meshing surface of the first prism group or the second prism group and configured to allow a first polarized light in an incident light to be transmitted through the polarization beam splitting layer to exit from the light outgoing side while reflecting a second polarized light in the incident light back to the light incidence side, the second polarized light having a polarization direction perpendicular to that of the first polarized light, wherein all of prisms in the first prism group and the second prism group have triangular sections, and wherein base angles of all of the prisms in the first prism group and the second prism group are substantially equal to a Brewster'"'"'s angle for the incident light being incident onto an interface of the polarization beam splitting layer from the second prism group; and wherein the polarization beam splitting layer has a multi-film composite structure composed of glass, TiO2 and SiO2. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A backlight module comprising:
a polarization beam splitter comprising; a second prism group and a first prism group formed sequentially from a light incidence side to a light outgoing side and meshing with each other; and a polarization beam splitting layer arranged on a meshing surface of the first prism group or the second prism group and configured to allow a first polarized light in an incident light to be transmitted through the polarization beam splitting layer to exit from the light outgoing side while reflecting a second polarized light in the incident light back to the light incidence side, the second polarized light having a polarization direction perpendicular to that of the first polarized light, wherein all of prisms in the first prism group and the second prism group have triangular sections, and wherein base angles of all of the prisms in the first prism group and the second prism group are substantially equal to a Brewster'"'"'s angle for the incident light being incident onto an interface of the polarization beam splitting layer from the second prism group; and wherein the polarization beam splitting layer has a multi-film composite structure composed of glass, TiO2 and SiO2. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A liquid crystal display apparatus comprising
a backlight module comprising: -
a polarization beam splitter comprising; a second prism group and a first prism group formed sequentially from a light incidence side to a light outgoing side and meshing with each other; and a polarization beam splitting layer arranged on a meshing surface of the first prism group or the second prism group and configured to allow a first polarized light in an incident light to be transmitted through the polarization beam splitting layer to exit from the light outgoing side while reflecting a second polarized light in the incident light back to the light incidence side, the second polarized light having a polarization direction perpendicular to that of the first polarized light, wherein all of prisms in the first prism group and the second prism group have triangular sections, and wherein base angles of all of the prisms in the first prism group and the second prism group are substantially equal to a Brewster'"'"'s angle for the incident light being incident onto an interface of the polarization beam splitting layer from the second prism group; and wherein the polarization beam splitting layer has a multi-film composite structure composed of glass, TiO2 and SiO2. - View Dependent Claims (14)
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Specification