Method and apparatus for edge lit displays

摘要

Edge lit displays are lit via a set (or individual) lighting elements. Each element projects light onto, for example, a zone which is then utilized directed as a backlight toward an LCD panel. An amount of light incident on any area (e.g., pixel) of the LCD panel (or SLM/series of SLMs) is calculated based on a sum of contributions from each zone. A similar process may be utilized for other lighting configurations. An amount of modulation performed by the LCD panel is then calculated based at least in part on lighting from the zones which may include brightness and varying levels of color content.

主权项

1. A display, comprising:
an array of light sources comprising a plurality of sets of the light sources; a zonal controller configured to energize at least one of the sets of light sources; and a modulating panel; wherein: each set of light sources are configured to produce a zonal illumination on the modulating panel and the modulating panel is configured to further modulate the zonal illuminations in a manner to produce a desired image; the zonal illuminations are based on image data and the further modulation of the zonal illuminations are based on a light field simulation of the zonal illuminations and the image data; the light field simulation comprises a summation of individual zonal illuminations' effect on pixels of the modulating panel; and the light field simulation comprises an output tristimulus value for each pixel vector r, comprising:[X⁡(r)Y⁡(r)Z⁡(r)]=∑j⁢([P]j·PSF⁡(r-rj)·xj·[PR⁡(r)PG⁡(r)PB⁡(r)])+∑j⁢([XYZ]j,m⁢⁢i⁢⁢n·PSF⁡(r-rj)·xj)(1) where: X(r), Y(r), and Z(r) comprise tri-stimulus values target outputs in front of the display at a particular pixel position vector r; PSF(r−rj) comprises a point spread function representing light from a jth LED centered at pixel position rj shining through a pixel at position r; xj comprises a representation of a desired light output from the jth LED; [P]j comprises a tristimulus calibration matrix for the jth LED comprising light from a particular tristimulus primary LED through a particular color LCD filter; [X Y Z]j,min comprises a representation of light leakage through the LCD while turned off due to jth LED at rj shining through a pixel at position r; and PR(r), PG(r), PB(r) comprise linear color LCD drive values that energize pixels on the LCD panel; and wherein the linear LCD drive values comprise:[PR⁡(r)PG⁡(r)PB⁡(r)]=[T]-1⁢([X⁡(r)Y⁡(r)Z⁡(r)]-∑j⁢([XYZ]j,min·PSF⁡(r-rj)·xj))⁢⁢where⁢[T]=∑j⁢[Pj]·PSF⁡(r-rj)·xj.(2)