| 摘要 |
A back light unit of an LCD(Liquid Crystal Display) display is provided to separate the color range generated at the back light unit clearly, thereby having the wide color representation range. A fluorescent body is formed at least a lamp(58). The fluorescent body includes the first red fluorescent body with the main wavelength at 620nm. The second red fluorescent body has the main wavelength at 658nm. The green fluorescent body has the main wavelength at 515nm. The blue fluorescent body has the main wavelength at 447nm. The lamp is arranged to a bottom cover. An optical member is arranged on the upper portion of the lamp. The lamp is a cold cathode fluorescent lamp. At the spectrum area of the fluorescent body, the first red fluorescent body has the area of 15-20%. The second red fluorescent body has the area of 30-40%. The green fluorescent body has the area of 20-30%. The blue fluorescent body has the area of 20-25%.
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