Red phosphor, method for producing red phosphor, white light source, illuminating device, and liquid crystal display device

A liquid crystal display device comprising:

• a liquid crystal display panel;
• and
• a backlight using a plurality of white light sources that illuminate the liquid crystal display panel,
• wherein the white light sources each include:
• a blue-emitting diode formed on an element substrate;
• and
• a kneaded product disposed on the blue-emitting diode, and provided as a product of a red phosphor and a green phosphor kneaded in a transparent resin, and
• wherein the red phosphor contains an element A, europium (Eu), silicon (Si), aluminum (Al), oxygen (O), and nitrogen (N) at the atom number ratio of the composition formula (1)
• [A(m-x)Eux]Si9AlyOnN[12+y−2(n−m)/3] Composition Formula (1);
• and
• Carbon,
• where the element A in the composition formula (1) is at least one of magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba), and m, x, y, and n in the composition formula (1) satisfy the relations 4.5<m<5, 0<x<1, 0<y<1, and 0<n<10, and
• wherein the compound of the composition formula (1) has a crystal structure that belongs to an orthorhombic system spatial point group Pmn21.