A display sheet comprising a substrate carrying layers of material; including
a
polymer-dispersed cholesteric liquid-crystal layer having a first high reflection
state within a portion of the visible light spectrum and a second less-reflective
state in said spectrum, said states being changeable by electric field between
the two states which states can be maintained in the absence of an electric field;
a first transparent conductor disposed over the polymer-dispersed cholesteric liquid-crystal
layer; a complementary light-absorbing layer below the polymer-dispersed cholesteric
liquid-crystal layer having relatively high light absorption within the spectrum
of the high-reflection state of the polymer-dispersed cholesteric liquid-crystal
layer and having relatively less light absorption in the spectrum complementary
to that of the high reflection state of the polymer-dispersed cholesteric liquid-crystal
layer; and a reflective second conductor under said complementary light-absorbing
layer reflecting light received from the complementary light-absorbing layer back
through the complementary light-absorbing layer.