Transflective displays with reflective polarizing transflector
First Claim
1. A reflective display, comprisinga light modulator provided to selectively alter a polarization state of polarized light passing through the light modulator, the light modulator having a viewer side and a back side;
- a reflective polarizer positioned on the back side of the light modulator to reflect light having a first polarization state and to transmit light having a second polarization state; and
a rear dichroic polarizer positioned between the light modulator and the reflective polarizer to allow at least a portion of light reflected by the reflective polarizer to be transmitted back through the light modulator.
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Abstract
A transflector is described which increases efficiency and brightness under both ambient and supplemental lighting conditions in visual display applications. In one embodiment, the transflector includes a reflective polarizing element that reflects one polarization of light and transmits the other. In an alternate embodiment, the transflector includes a reflective polarizing element and a diffusing element such that the transflector diffusely reflects light of one polarization and transmits the other. The transflector is useful for both reflective and transflective liquid crystal displays.
109 Citations
9 Claims
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1. A reflective display, comprising
a light modulator provided to selectively alter a polarization state of polarized light passing through the light modulator, the light modulator having a viewer side and a back side; -
a reflective polarizer positioned on the back side of the light modulator to reflect light having a first polarization state and to transmit light having a second polarization state; and
a rear dichroic polarizer positioned between the light modulator and the reflective polarizer to allow at least a portion of light reflected by the reflective polarizer to be transmitted back through the light modulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification