Electronic devices with infrared blocking filters
First Claim
1. An electronic device comprising:
- a window that transmits visible light and infrared light;
a layer of material on the window that has a light transmission of 1-10%;
a light sensitive component aligned with the window; and
an infrared-light-blocking filter configured to receive the visible and infrared light and to pass the visible light and block the infrared light, comprising;
an infrared-light-blocking-and-visible-light-transmitting glass substrate that is configured to pass the visible light and block the infrared light, wherein the infrared-light-blocking-and-visible-light-transmitting glass substrate has opposing first and second surfaces;
a thin-film interference filter formed from a stack of dielectric layers with different refractive indices on the first surface of the infrared-light-blocking-and-visible-light-transmitting glass substrate, wherein the thin-film interference filter is configured to pass the visible light and block the infrared light; and
a layer of metal on the second surface of the infrared-light-blocking-and-visible-light-transmitting glass substrate that blocks the infrared light and passes the visible light.
1 Assignment
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Accused Products
Abstract
An electronic device may be provided with one or more light-sensing components such as a camera and a color ambient light sensor. Optical structures such as camera lenses or a light pipe may be used to convey light from a window in an electronic device to a light-sensing component. One or more infrared-light-blocking-and-visible-light transmitting light filters may be interposed between a light-receiving window in an electronic device and a light-sensing component. The light filters may include infrared-light-blocking glass substrates, silver or other infrared-light-blocking thin films, and/or thin-film interference filters formed from stacks of dielectric layers that serve as infrared light-blocking layers.
85 Citations
18 Claims
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1. An electronic device comprising:
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a window that transmits visible light and infrared light; a layer of material on the window that has a light transmission of 1-10%; a light sensitive component aligned with the window; and an infrared-light-blocking filter configured to receive the visible and infrared light and to pass the visible light and block the infrared light, comprising; an infrared-light-blocking-and-visible-light-transmitting glass substrate that is configured to pass the visible light and block the infrared light, wherein the infrared-light-blocking-and-visible-light-transmitting glass substrate has opposing first and second surfaces; a thin-film interference filter formed from a stack of dielectric layers with different refractive indices on the first surface of the infrared-light-blocking-and-visible-light-transmitting glass substrate, wherein the thin-film interference filter is configured to pass the visible light and block the infrared light; and a layer of metal on the second surface of the infrared-light-blocking-and-visible-light-transmitting glass substrate that blocks the infrared light and passes the visible light. - View Dependent Claims (2, 3, 4)
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5. An electronic device comprising:
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a window that transmits visible light and infrared light; a layer of material on the window that has a light transmission of 1-10%; a light sensitive component aligned with the window; and an infrared-light-blocking filter between the window and the light sensitive component comprising; an infrared-light-blocking-and-visible-light-transmitting glass substrate; and a thin-film layer of metal on the infrared-light-blocking-and-visible-light-transmitting glass substrate that blocks infrared light and passes visible light. - View Dependent Claims (6, 7, 8)
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9. An electronic device, comprising:
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a window that transmits visible and infrared light; a layer of material on the window that has a light transmission of 1-10%; a light sensitive component aligned with the window; and a light filter between the window and the light sensitive component that blocks the infrared light and transmits the visible light, wherein the light filter includes an infrared-light-blocking-and-visible-light-transmitting glass substrate and a thin-film interference filter formed from a stack of dielectric layers with different refractive indices on the infrared-light-blocking-and-visible-light-transmitting glass substrate. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification