Reflective guest-host liquid-crystal display device

A method of manufacturing a display device, said method comprising the steps of:

• forming switching elements and a light reflection layer on a first substrate;
• forming a plane-divided color filter layer on said light reflection layer in such a manner as to provide individual filters aligned with respective ones of the pixel electrodes;
• forming a plane-divided phase shifter on said color filter layer such that a plurality of phase shifters are in one-to-one correspondence with respective ones of the filters;
• forming pixel electrodes on said phase shifter layer in such a manner as to be aligned with each of said color filters and connecting the pixel electrodes to the switching elements corresponding to the pixel electrodes;
• joining a second substrate having a counter electrode formed thereon to said first substrate with a predetermined spacing therebetween;
• and
• providing a guest-host liquid-crystal layer into said spacing.

A display device, comprising:

• a first substrate, formed with a transparent electrode on an inner surface;
• a second substrate spaced apart from the first substrate, the second substrate having an inner surface on which a plurality of reflection electrodes are formed disposed facing said first substrate, said reflection electrodes defining a plurality of pixels;
• a plurality of color filters associated with respective ones of said pixels;
• and
• an electro-optic element, held between said first substrate and said second substrate, for performing light modulation in response to a voltage applied between said transparent electrode and said reflection electrode, said electro-optic element having a laminated structure including a guest-host liquid-crystal layer which contains a dichroic dye and which is uniformly oriented along said transparent electrode, and a plurality of phase shifters arranged in one-to-one correspondence with respective ones of the plurality of pixels wherein the phase shifters have a thickness that varies according to a corresponding wavelength of a filter associated with the phase shifter.

A display device comprising:

• a transparent substrate positioned on an incidence side;
• a reflection substrate spaced apart from the transparent substrate which is positioned on a reflection side and which includes a plurality of pixel electrodes;
• a guest-host liquid-crystal layer which is held between said transparent substrate and said reflection substrate;
• and
• a plurality of phase shifters in one-to-one correspondence with corresponding ones of the plurality of pixel electrodes positioned between said reflection substrate and said liquid-crystal layer, for causing a phase shift of a quarter wavelength with respect to incident light
• wherein said phase shifters each comprise a dye so as to selectively permit incident light of a corresponding wavelength component to pass through.

A method of manufacturing a display device comprising a transparent electrode substrate, a reflection electrode substrate joined to said transparent electrode substrate with a predetermined spacing therebetween, a guest-host liquid-crystal layer held in said spacing, and a plurality of phase shifters, said method comprising:

• forming a first phase shifter layer to a thickness corresponding to a wavelength of a first color over a reflection electrode layer and then patterning the first phase shifter layer so as to leave the first phase shifter layer on only the pixels associated with the first color;
• forming a second phase shifter layer to a thickness corresponding to a wavelength of a second color over the reflection electrode layer and then patterning the second phase shifter layer so as to leave the second phase shifter layer on only the pixels associated with the second color;
• and
• forming a third phase shifter layer to a thickness corresponding to a wavelength of a third color over the reflection electrode layer and then patterning the third phase shifter layer so as to leave the third phase shifter layer on only the pixels associated with the third color.