SOLID STATE LIGHT-EMITTING DEVICES WITH IMPROVED CONTRAST

摘要

Solid state light emitting devices and display devices include at least one filtering material arranged to provide at least one spectral notch comprising a wavelength of greatest attenuation in at least one spectrum between dominant wavelengths of solid state light emitters of the light emitting and/or display devices. The at least one spectral notch may be non-overlapping with a majority or an entirety of spectral output of each solid state light emitter. Filtering material may be arranged in a light path between at least some emitters and) at least one light output surface of a light emitting or display device, with the filtering material(s) arranged to receive incident ambient light, such that at least a portion of reflected ambient light exiting the device exhibits at least one spectral notch.

主权项

1. A display device adapted to display at least one of text and visual images, the display device comprising:
a plurality of electrically activated solid state light emitters including a first group of solid state emitters arranged to generate emissions having a first dominant wavelength and a second group of solid state emitters arranged to generate emissions having a second dominant wavelength that differs from the first dominant wavelength by at least 50 nm; and at least one filtering material arranged in a light path between (i) at least some solid state light emitters of the plurality of electrically activated solid state light emitters and (ii) at least one light output surface of the display device, wherein the at least one filtering material is arranged to receive ambient light incident on the display device such that at least a portion of reflected ambient light exiting the display device exhibits a first spectral notch, wherein the first spectral notch comprises a wavelength of greatest attenuation between the first dominant wavelength and the second dominant wavelength.