Display lighting systems with circadian effects

Abstract

Display systems for displaying digital content. The display systems have one or more LED-based lighting channels adapted to generate a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode. The circadian-inducing blue light can have a first circadian-stimulating energy characteristic related to the associated first spectral power distributions of light generated in the first operational mode, and the non-circadian-inducing blue light can have a second circadian-stimulating energy characteristic related to the associated second spectral power distribution of light generated in the second operational mode. Disclosure methods of generating digital display content with the display systems described herein. The methods can generate a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode.

1 - 30 . (canceled) 
     
     
         31 . A display system, comprising:
 a backlight for emitting a white light and comprising one or more LEDs; and   filters overlaying said backlight and defining a plurality of pixels, each pixel comprising sub-pixels for filtering different colors, wherein at least one sub-pixel is configured for transmitting a first emission having a first peak wavelength greater than 470 nm and no greater than 510 nm.   
     
     
         32 . The display system of  claim 31 , wherein said white light has a first peak wavelength greater than 470 nm and no greater than 510 nm. 
     
     
         33 . The display system of  claim 31 , wherein said white light has a peak wavelength of 485 nm. 
     
     
         34 . The display system of  claim 31 , wherein said first emission has a band having a full-width half-maximum wavelength ranges of between about 10 nm and about 30 nm. 
     
     
         35 . The display system of  claim 31 , wherein said first emission has a band having energy of at least 10% of total energy of said white light in the range of at least one of 460 nm to 500. 
     
     
         36 . The display system of  claim 31 , wherein said backlight has a ratio of spectral power in the wavelength range of 430 nm<λ≤460 nm over 320 nm<λ≤800 nm to spectral power in the wavelength range of 470 nm<λ≤510 nm over 320 nm<λ≤800 nm, wherein said ratio is less than 1. 
     
     
         37 . The display system of  claim 40 , wherein said ratio is no greater than 0.61 
     
     
         38 . The display system of  claim 41 , wherein said ratio is no greater than 0.44 
     
     
         39 . The display system of  claim 31 , wherein said plurality of sub-pixels transmit at least blue, green/cyan, and red sub-pixels. 
     
     
         40 . The display system of  claim 31 , wherein said one or more LEDs comprise a phosphor. 
     
     
         41 . The display system of  claim 31 , wherein said one or more LEDs comprise a violet pump white LED and a blue pump white LED. 
     
     
         42 . The display system of  claim 31 , wherein said backlight is configured to operate in at least a low EML mode and a high EML mode, in said low EML mode, said violet pump white LED is on, and, in said high EML mode, said blue pump white LED is on and said at least one sub-pixel transmits said first emission having a first peak wavelength greater than 470 nm and no greater than 510 nm. 
     
     
         43 . The display system of  claim 41 , wherein said backlight has a first EML value in said high EML mode and a second EML value in said low EML mode. 
     
     
         44 . The display system of  claim 42 , wherein the ratio of the first EML value to the second EML value can be between about 2.0 and about 5.5. 
     
     
         45 . The display system of  claim 31 , wherein at least one second sub-pixel of said plurality of sub-pixels transmits a second emission having a second peak wavelength less than 470 nm. 
     
     
         46 . The display system of  claim 43 , further comprising drive circuitry to selectivity drive said at least one sub-pixel and said at least one second sub-pixel to vary EML between at least a first EML value and a second EML value the display.