Method and apparatus for increasing microdisplay black state in light management systems and flexibility to utilize polarized or unpolarized input light
First Claim
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1. A kernel, comprising:
- an input face configured to receive input polarized light;
a beam separating dichroic arranged on a diagonal to the input polarized light and configured to separate the input polarized light into a first color beam and a second color beam.
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Abstract
A dichroic is positioned to separate color beams of polarized input light. The color beams are directed to microdisplays that contain correspondingly colored content in a kernel of a Light Management System (LMS). Adjustment of a voltage amplitude of the microdisplays is set to produce a maximum black state of the LMS. In one embodiment, a passive nematic liquid crystal device is utilized as a quarter waveplate. A thickness of a liquid crystal layer (d) is matched to a birefringence (Δn) of the nematic such that retardation dΔn=¼λ.
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Citations
13 Claims
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1. A kernel, comprising:
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an input face configured to receive input polarized light;
a beam separating dichroic arranged on a diagonal to the input polarized light and configured to separate the input polarized light into a first color beam and a second color beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A quality control method, comprising the steps of:
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producing a display device having at least one microdisplay; and
setting a voltage amplitude on a microdisplay to produce a highest black state of the display device. - View Dependent Claims (11, 12, 13)
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Specification