초록 ▼

A plane light source unit for backlighting and a method for manufacturing holographic light-guides used for the same is disclosed. The holographic light-guide has a first holographic layer on the bottom surface. The first holographic layer has patterns formed with a plurality of holograms, the area

A plane light source unit for backlighting and a method for manufacturing holographic light-guides used for the same is disclosed. The holographic light-guide has a first holographic layer on the bottom surface. The first holographic layer has patterns formed with a plurality of holograms, the area density of the pattern being low toward the tubular light source and increasing with an increase in distance from the tubular light source, thereby uniformly illuminating the LCD panel. The holographic light-guide also has a second holographic layer on the top surface, the second holographic layer adjusting scattering pattern of the beam emerged from the light-guide plate.

대표청구항 ▼

1. A plane light source unit for a flat panel display, comprising:at least one tubular light source, elongated in a direction; a holographic light-guide having at least one light incident surface placed near the tubular light source, a reflecting surface on which a first holographic layer is formed

1. A plane light source unit for a flat panel display, comprising:at least one tubular light source, elongated in a direction; a holographic light-guide having at least one light incident surface placed near the tubular light source, a reflecting surface on which a first holographic layer is formed for uniform illumination, and a light emitting surface; and a reflector disposed against the reflecting surface of the holographic light-guide, for reflecting the light that emerges from the reflecting surface and redirecting the light to the reflecting surface, wherein the first holographic layer has patterns with a plurality of holograms formed therein, the area density of the patterns being low toward the tubular light source and increasing with an increase in distance from the tubular light source.