Axisymmetrically oriented liquid crystal display device with concave portion defined by the second derivative

A liquid crystal display device comprising a display medium containing at least liquid crystal between a pair of substrates at least one of which is transparent,

• at least one of the pair of substrates being provided with a film having a concave portion on the side facing the display medium, the concave portion having a bottom portion in a vicinity of a center of the concave portion viewed from a normal direction of the substrate, liquid crystal molecules contained in the display medium being oriented axisymmetrically around the bottom portion or the vicinity thereof,
• wherein a contour defining the concave portion in a vertical plane bisecting the bottom portion is a straight line.

A liquid crystal display device comprising a display medium containing at least liquid crystal between a pair of substrates at least one of which is transparent,

• at least one of the pair of substrates being provided with a film having a concave portion on the side facing the display medium, the concave portion having a bottom portion in a vicinity of a center of the concave portion viewed from a normal direction of the substrate, liquid crystal molecules contained in the display medium being oriented axisymmetrically around the bottom portion or the vicinity thereof,
• wherein a contour defining the concave portion in a vertical plane bisecting the bottom portion is a curve, and a sign of a second differential of the curve is negative.

A liquid crystal display device comprising a display medium containing at least liquid crystal between a pair of substrates at least one of which is transparent,

• at least one of the pair of substrates being provided with a film having a concave portion on the side facing the display medium, the concave portion having a bottom portion in a vicinity of a center of the concave portion viewed from a normal direction of the substrate, liquid crystal molecules contained in the display medium being oriented axisymmetrically around the bottom portion or the vicinity thereof,
• wherein a contour defining the concave portion in a vertical plane bisecting the bottom portion is a curve, and the curve has a portion where a sign of a second differential of the curve is positive and a portion where the sign of the second differential of the curve is negative.

A liquid crystal display device comprising a display medium containing at least liquid crystal between a pair of substrates at least one of which is transparent

• at least one of the pair of substrates being provided with a film having a concave portion on the side facing the display medium, the concave portion having a bottom portion in a vicinity of a center of the concave portion viewed from a normal direction of the substrate, liquid crystal molecules contained in the display medium being oriented axisymmetrically around the bottom portion or the vicinity thereof,
• wherein the display medium includes a liquid crystal region mainly containing liquid crystal and a polymer region surrounding the liquid crystal region, and
• wherein a gradient of a surface of the film having the concave portion continuously changes at a border between a pixel portion where the liquid crystal region lies and a non-pixel portion.