Reflective color LCD with color filters having particular transmissivity
AssigneeSeiko Epson Corporation
InventorsOsamu Okumura, Eiji Okamoto, Tsuyoshi Maeda, Toshiharu Matsushima
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Abstract
A reflective type color liquid crystal device includes first and second substrates. Each substrate has an opposing inner surface. Each of the opposing inner surfaces has an electrode and forms a matrix-patterned dot group. Multiple liquid crystals are disposed between the substrates. The device also includes multiple color filters, including at least two different colors, at least one polarizing plate, and a reflective plate. At least one color of the color filters has a transmissivity of at least 50% for light of all the wavelengths in a range between 450 nm and 660 nm.
Claims43
A reflective type color liquid crystal device, comprising:
- first and second substrates, each substrate having an opposing inner surface;
- a liquid crystal layer disposed between said substrates;
- a plurality of color filters disposed on one of said substrates, including at least two different colors;
- at least one polarizing plate disposed on said first substrate;
- a reflective plate disposed on said second substrate;
- and
- wherein said color filters have a transmissivity of at least 30% for light of all wavelengths in a range of 450 nm to 660 nm.
A reflective type color liquid crystal device, comprising:
- first and second substrates, each substrate having an opposing inner surface;
- a liquid crystal layer disposed between said substrates;
- a plurality of color filters disposed on one of said substrates, including at least two different colors;
- at least one polarizing plate disposed on said first substrate;
- a reflective plate disposed on said second substrate;
- and
- wherein at least one color of the color filters has a transmissivity of at least 50% for light of all wavelengths in a range of 450 nm to 660 nm.
A reflective type color liquid crystal device, comprising:
- first and second substrates, each substrate having an opposing inner surface;
- a liquid crystal layer disposed between said substrates;
- a plurality of color filters disposed on one of said substrates, including at least first and second color filters of different colors;
- at least one polarizing plate disposed on said first substrate;
- a reflective plate disposed on said second substrate;
- and
- wherein a lowest transmissivity of the first color filter for light of wavelengths in the range of 450 nm to 660 nm is less than a lowest transmissivity of the second color filter for light of wavelengths in the range of 450 nm to 660 nm.
A reflective type color liquid crystal device, comprising:
- first and second substrates, each substrate having an opposing inner surface;
- a liquid crystal layer disposed between said substrates;
- a plurality of color filters disposed on one of said substrates, including at least two different colors;
- at least one polarizing plate disposed on said first substrate;
- a reflective plate disposed on said second substrate;
- wherein said color filters have first color filter, second color filter, and third color filter, said first color filter has a transmissivity of at least 70% for light of all wavelengths in a range of 570 nm to 660 nm, said second color filter has a transmissivity of at least 70% for light of all wavelengths in a range of 510 nm to 590 nm, said third color filter has a transmissivity of at least 70% for light of all wavelengths in a range of 450 nm to 520 nm.
Dependencies are inferred from the claim text.