on the light guide. When the liquid crystal display comprises a pair of first and second substrates being at least partially transparent and the liquid crystal is arranged between the first and second substrates, the band-pass filter may be arranged on at least one of the first and second substrates. The band-pass filter may be arranged on at least one of the first and second polarizer plates. The band-pass filter is preferably arranged between the light source and the liquid crystal.
When the liquid crystal display comprises a color filter including a portion for transmitting therethrough a blue light, the portion includes an agent for absorbing the component of the light as the band-pass filter.
The band-pass filter may be a stack of layers. The band-pass filter may be apolymer for absorbing the component of the light. The band-pass filter may be a resin including an agent for absorbing the component of the light.
The light source may include a fluorescent substance for generating the light. The liquid crystal and the pair of first and second polarizer plates may form a normally close type liquid crystal display unit. A direction in which the light is transmitted in the liquid crystal may be prevented from being parallel to a direction in which the electric field is generated or may be transverse with respect to the direction in which the electric field is generated. The liquid crystal and the pair of first and second polarizer plates may form a super twisted nematic type liquid crystal display unit.