Liquid crystal display device having cholesteric liquid crystal

A liquid crystal display device, comprising:

• first and second substrates facing each other and spaced apart from each other;
• a liquid crystal layer interposed between the first and second substrates;
• a first polarizer formed on the second substrate and facing the liquid crystal layer, the first polarizer being made of cholesteric liquid crystal;
• color filters formed on the first polarizer and facing the first substrate, wherein each color filter has one of a plurality of primary colors;
• a black matrix formed in the boundaries between the color filters, wherein the black matrix is on the first polarizer, and wherein the black matrix is made of the same material as the first polarizer;
• and
• a backlight device arranged under the second substrate.

A liquid crystal display device, comprising:

• a backlight device irradiating light;
• a polarizer converting the light from the backlight device into a first circularly polarized light, the polarizer being made of cholesteric liquid crystal;
• color filters coloring the first circularly polarized light into one of a plurality of primary colors;
• a black matrix formed in the boundary between the color filters, wherein the first circularly polarized light is reflected by the black matrix and then passes through the polarizer;
• and
• a reflective plate formed in the backlight device,
• wherein the first circularly polarized light reflected by the black matrix and passing through the polarizer is converted as it reflected by the reflective plate of the backlight device into the second circularly polarized light,
• wherein the second circularly polarized light is reflected by the polarizer and reaches the reflective plate,
• wherein the second circularly polarized light reflected by the polarizer is converted into the first circularly polarized light, and then the first circularly polarized light passes through the polarizer.

A liquid crystal display device, comprising:

• first and second substrates facing and spaced apart from each other;
• a liquid crystal layer interposed between the first and second substrates;
• a first polarizer formed under the second substrate and on the opposite side relative to the liquid crystal layer, the first polarizer being made of cholesteric liquid crystal;
• color filters formed on the second substrate and facing the first substrate, wherein each color filter has one of a plurality of primary colors;
• a black matrix formed in the boundaries between the color filters, wherein the black matrix is on the second substrate, and wherein the black matrix is made of the same material as the first polarizer;
• and
• a backlight device arranged under the second substrate,
• wherein the first polarizer reflects right-handed circularly polarized light and the black matrix reflects left-handed circularly polarized light.

A liquid crystal display device, comprising:

• first and second substrates facing and spaced apart from each other;
• a liquid crystal layer interposed between the first and second substrates;
• a first polarizer formed under the second substrate and on the opposite side relative to the liquid crystal layer, the first polarizer being made of cholesteric liquid crystal;
• color filters formed on the second substrate and facing the first substrate, wherein each color filter has one of a plurality of primary colors;
• a black matrix formed in the boundaries between the color filters, wherein the black matrix is on the second substrate, and wherein the black matrix is made of the same material as the first polarizer;
• and
• a backlight device arranged under the second substrate,
• wherein the first polarizer reflects left-handed circularly polarized light and the black matrix reflects right-handed circularly polarized light.

A liquid crystal display device, comprising:

• first and second substrates facing and spaced apart from each other;
• a liquid crystal layer interposed between the first and second substrates;
• a polarizer formed under the second substrate and on the opposite side relative to the liquid crystal layer, the polarizer being made of cholesteric liquid crystal;
• color filters formed on the second substrate and facing the first substrate, wherein each color filter has one of a plurality of primary colors;
• a black matrix formed in the boundaries between the color filters, wherein the black matrix is on the second substrate, and wherein the black matrix is made of the same material as the polarizer;
• and
• a backlight device arranged under the second substrate, wherein light from the backlight device interplays with the polarizer and the black matrix to improve light efficiency.