Polarizing edge coupled light in backlight
AssigneeLumileds LLC
InventorsMehdi Aas, Nicola Bettina Pfeffer, Arjen Gerben Van der Sijde, Erno Fancsali
Life of this patent
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Abstract
A backlight apparatus can include a light emitting element configured to emit visible light. The backlight apparatus can include a polarizing device including a prism situated to receive the visible light and to polarize the visible light to generate polarized light. The backlight apparatus can include a light guide panel configured to receive the polarized light at an input surface facing the polarizing device and to distribute the polarized light to a major surface of the light guide panel facing a display screen.
Claims14
An apparatus, comprising:
- a light emitting element configured to emit visible light;
- a polarizing device including a prism situated to receive the visible light and to polarize the visible light to generate polarized light;
- and
- a light guide panel configured to receive the polarized light at an input surface facing the polarizing device and to distribute the polarized light to a major surface of the light guide panel facing a display screen, the polarizing device including a first exposed surface and a second exposed surface and four non-exposed surfaces, and further includes a reflecting component on the non-exposed surfaces, the first exposed surface facing the light emitting element and the second exposed surface facing the input surface of the light guide panel.
A method for forming an apparatus, the method comprising:
- coupling a visible light-emitting element to a circuit board and in a bezel of a backplate;
- situating a light guide panel including an input surface and a transmission surface, the transmission surface generally perpendicular to the input surface, such that the input surface faces the light-emitting element;
- and
- situating a polarizing device, including a prism, to receive visible light from the light-emitting element, polarize the visible light, and transmit the polarized light to the input surface of the light guide panel, the polarizing device including first and second exposed surfaces, four non-exposed surfaces, and a reflecting component on the non-exposed surfaces, the first exposed surface facing the light emitting element, and the second exposed surface facing the input surface of the light guide panel.
A display device comprising:
- a backplate;
- a light emitting element located within a bezel of the backplate and configured to emit visible light;
- a polarizing device including a prism situated to receive the visible light and to polarize the visible light to generate polarized light;
- a light guide panel configured to receive the polarized light at an input surface facing the polarizing device and to distribute the polarized light to a major surface of the light guide panel;
- and
- a display screen to receive light from the major surface, the polarizing device including a first exposed surface and a second exposed surface, four non-exposed surfaces, and a reflecting component on the non-exposed surfaces, the first exposed surface facing the light emitting element, and the second exposed surface facing the input surface of the light guide panel.
Dependencies are inferred from the claim text.