Patent ID: 7990039
Filing Date: 2011-08-02
Classification: G02F,H01J

Abstract:
1. A liquid crystal display device comprising: a liquid crystal display panel; a backlight which radiates illumination light to the liquid crystal display panel; and a cold cathode fluorescent lamp which constitutes a light source of the backlight; wherein the cold cathode fluorescent lamp includes a light-transmitting glass tube, a pair of cold cathodes which is respectively arranged at both end portions of the glass tube such that the cold cathodes face each other in an opposed manner, and a phosphor film which is formed on an inner peripheral surface of the glass tube, the phosphor film is formed such that a phosphor suspension is formed by mixing phosphors into a suspension produced by strongly stirring a mixed solvent made of butyl acetate and nitrocellulose and by re-stirring the mixture, and the phosphor suspension is applied to the inner peripheral surface of the glass tube by coating, and the phosphor film has an ultraviolet-ray transmissivity of approximately 2% to 4%, and has a film thickness of 12±2 μm.