Electronic Devices Having Light Sensors With Thin-Film Filters
First Claim
1. An electronic device, comprising:
- a display;
a color ambient light sensor; and
control circuitry configured to adjust the display based on ambient light color and ambient light intensity information from the color ambient light sensor, wherein the color ambient light sensor comprises;
a light detector integrated circuit having a plurality of photodetectors; and
a color filter layer on the light detector integrated circuit, wherein the color filter layer has a plurality of thin-film interference color filters associated respectively with each of the plurality of photodetectors, each thin-film interference color filter having a pass band of a different color, wherein the color filter layer has a common dielectric stack that overlaps the plurality of photodetectors and has a plurality of color-filter-specific dielectric stacks each formed on the common dielectric stack, and wherein each of the thin-film interference color filters is formed from a respective one of the color-filter-specific dielectric stacks and a respective portion of the common dielectric stack that is overlapped by that color-filter-specific dielectric stack.
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Accused Products
Abstract
An electronic device may be provided with a display mounted in a housing. The display may have an array of pixels that form an active area and may have an inactive area that runs along an edge of the active area. An opaque layer may be formed on an inner surface of a display cover layer in the inactive area of the display or may be formed on another transparent layer in the electronic device. An ambient light sensor window may be formed from the opening and may be aligned with color ambient light sensor. The ambient light sensor may have an integrated circuit with an array of photodetectors and may have a color filter layer forming a corresponding array of thin-film interference color filters with different respective pass bands. The color filter layer may have a shared dielectric stack and multiple color-filter-specific dielectric stacks on the shared dielectric stack.
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Citations
20 Claims
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1. An electronic device, comprising:
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a display; a color ambient light sensor; and control circuitry configured to adjust the display based on ambient light color and ambient light intensity information from the color ambient light sensor, wherein the color ambient light sensor comprises; a light detector integrated circuit having a plurality of photodetectors; and a color filter layer on the light detector integrated circuit, wherein the color filter layer has a plurality of thin-film interference color filters associated respectively with each of the plurality of photodetectors, each thin-film interference color filter having a pass band of a different color, wherein the color filter layer has a common dielectric stack that overlaps the plurality of photodetectors and has a plurality of color-filter-specific dielectric stacks each formed on the common dielectric stack, and wherein each of the thin-film interference color filters is formed from a respective one of the color-filter-specific dielectric stacks and a respective portion of the common dielectric stack that is overlapped by that color-filter-specific dielectric stack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic device, comprising:
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a housing; a display coupled to the housing, wherein the display has an ambient light sensor window; and a color ambient light sensor in alignment with the ambient light sensor window, wherein the color ambient light sensor has an integrated circuit with a plurality of photodetectors and a color filter layer overlapping the plurality of photodetectors, wherein the color filter layer includes a plurality of thin-film interference color filters associated respectively with each of the plurality of photodetectors, each thin-film interference color filter configured to pass light in a different respective band of wavelengths, wherein the color filter layer has a shared dielectric stack that overlaps the plurality of photodetectors and has a plurality of color-filter-specific dielectric stacks each formed on the shared dielectric stack, wherein each of the thin-film interference color filters if formed from a respective one of the color-filter-specific dielectric stacks and a corresponding portion of the common dielectric stack that is overlapped by that color-filter-specific dielectric stack. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An ambient light sensor, comprising:
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a light detector integrated circuit having a plurality of photodetectors; and a color filter layer overlapping the plurality of photodetectors, wherein the color filter layer has; a shared dielectric stack that overlaps the plurality of photodetectors; and a plurality of color-filter-specific dielectric stacks each formed directly on the shared dielectric stack, wherein each color-filter-specific dielectric stack and a respective portion of the shared dielectric stack that is overlapped by that color-filter-specific dielectric stack forms a respective color filter that passes light in a different respective wavelength band. - View Dependent Claims (19, 20)
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Specification