Granted Patent B2

US 12,480,625 · App. 18/233,513 · Granted Nov 25, 2025

Inventors: Michael R. Krames (Mountain View, CA); Aurelien J.F. David (San Francisco, CA)

Assignee: KORRUS, INC.

F21K9/23A61M21/02A61N5/0618F21K9/232F21K9/235F21K9/64F21S4/20F21V9/08F21V15/01F21V19/006F21V29/70H05B45/20H05B47/105H05B47/16A61M2021/0044A61N2005/0651A61N2005/0663F21K9/238F21V23/003F21V29/74F21W2107/10F21Y2105/10F21Y2105/18F21Y2113/13F21Y2115/10Y02B20/40

Abstract

Claims (22)

1 . A light emitter comprising:

an array of pixels, each pixel comprising at least three subpixels, said at least three subpixels comprising a red subpixel (R), a green subpixel (G), and a short blue subpixel (SB), wherein said SB has a peak wavelength of 410 nm and 440 nm;

a controller for controlling said subpixels; and

a long blue subpixel (LB).

2 . The light emitter of claim 1 , wherein said R and G are unsaturated.

3 . The light emitter of claim 1 , wherein said subpixels are emissive.

4 . The light emitter of claim 3 , wherein said subpixels are OLEDs.

5 . The light emitter of claim 3 , wherein said subpixels are microLEDs.

6 . The light emitter of claim 1 , wherein said array of pixels does not have a blue subpixel.

7 . The light emitter of claim 1 , wherein said LB has a peak wavelength of 440 nm to 460 nm.

8 . The light emitter of claim 7 , wherein said controller is configured to controlling said subpixels in two or more modes, a first mode in which said R, G, and SB are driven, and a second mode in which said R, G, and LB are driven.

9 . The light emitter of claim 8 , wherein said array of pixels emits white light at a certain CCT having a first spectral power distribution (SPD) in said first mode, and a second SPD in said second mode, wherein said first and second SPDs are different, and wherein said first SPD has a lower circadian stimulation (CS) than that of said second SPD.

10 . The light emitter of claim 9 , wherein first SPD has a CS which is less than half that of said second SPD.

11 . The light emitter of claim 10 , wherein said first SPD, has a total power from 350 nm to 850 nm and a LB power from 440 nm to 500 nm, wherein said LB power is less than 10 % of said total power.

12 . The light emitter of claim 11 , wherein said first SPD has a SB power from 400 nm to about 440 nm, wherein said SB power is at least 15% of said total power.

13 . The light emitter of claim 10 , wherein said first and second SPDs have a color rendering index (CRI) greater than 80, and an R9 greater than 0.

14 . The light emitter of claim 8 , wherein said controller is configured for controlling said subpixels in a third mode, wherein, in said third mode, said R, G, SB and LB are driven.

15 . The light emitter of claim 8 , wherein said controller is configured to:

receive an image data signal and a circadian data signal;

select one of said two or more modes based on said circadian data signal; and

generate a light emitter signal in a selected mode based on said image data signal.

16 . The light emitter of claim 1 , wherein said SB has a peak wavelength of 420 to 430 nm said R has a peak wavelength of 630 nm, said G has a peak wavelength of 530 nm.

Continuity (8)

References Cited (266)