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Samsung patents display tech that balances color brightness in waveguides

Samsung has been granted a patent for an electronic display that uses a waveguide to project light from LEDs. The system includes a processor that adjusts the power sent to different colored LEDs to compensate for the fact that the waveguide transmits some colors more efficiently than others.

Why it mattersThis improves the color accuracy and brightness balance of displays that use waveguide technology, which is common in augmented reality headsets and some advanced screens.

In the filing’s own words

An electronic device includes a power supply; a display including light-emitting diodes (“LED”s), a projection lens, and a waveguide arranged in a way such that light emitted from the LEDs is input to the waveguide through the projection lens, and light-outputting efficiency of the waveguide for a first color is higher than light-outputting efficiency of the waveguide for a second color; a memory; and a processor which determines a first driving power for a first LED which emits light of the first color and a second driving power for a second LED which emits light of the second color based on the light-outputting efficiencies of the waveguide for the first color and the second color, and controls the power supply in a way such that the first and second driving powers are supplied to the first and second LEDs, respectively.

What exactly they claim (claim 1)

1. An electronic device comprising: a power supply; a display comprising a plurality of light-emitting diodes, a projection lens, and a waveguide, which are arranged in a way such that light emitted from the plurality of light-emitting diodes is input to the waveguide through the projection lens, wherein light-outputting efficiency of the waveguide for a first color based on diffraction of the light input thereto is higher than light-outputting efficiency of the waveguide for a second color based on the diffraction of the light input thereto; a memory; and a processor which determines a first driving power for a first light-emitting diode which emits light of the first color among the plurality of light-emitting diodes and a second driving power for a second light-emitting diode which emits light of the second color among the plurality of light-emitting diodes based on the light-outputting efficiency of the waveguide for the first color and the light-outputting efficiency of the waveguide for the second color, and controls the power supply in a way such that the first driving power is supplied to the first light-emitting diode and the second driving power is supplied to the second light-emitting diode while an image is displayed on the display, wherein a ratio of the first driving power to the second driving power is inversely proportional to a ratio of the light-outputting efficiency of the waveguide for the first color to the light-outputting efficiency of the waveguide for the second color.

Facts

Company
Samsung (SAMSUNG ELECTRONICS CO., LTD.)
Official title
Electronic device and controlling method of electronic device
Patent number
US12736818B2
Application number
18327891
Filed
Jun 2, 2023
Granted
Sep 15, 2026
Inventors
4
Claims
6

Classified under

G02B 27/0172 Physics & computingG02B 2027/0112 Physics & computingG02B 2027/0118 Physics & computingG02B 2027/0178 Physics & computing
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.