Light guiding plate, liquid crystal display device using the same, and method for displaying pictures thereof
First Claim
Patent Images
1. A light guiding plate comprising:
- a light incident side portion into which a light is incident;
a first surface for reflecting the light incident through the light incident side portion, the first surface having a light reflection pattern including a plurality of alternately disposed light reflection planes and non-reflection planes, the light reflection planes facing the light incident side portion so as to reflect the light inputted through the light incident side portion; and
a second surface opposite the first surface, the light reflection plane having an inclined angle with respect to the second surface, the angle being proportional to a distance between the light incident side portion and the light reflection plane.
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Abstract
Disclosed are a light guiding plate, a liquid crystal display device using the same, and a method for displaying an image thereof. The light reflection path is varied in the guiding plate, such that a portion of the light supplied to a bright region of an effective display area is shifted into a dark region, thereby obtaining a uniform brightness distribution over the entire effective display area. The liquid crystal display device can display information with improved brightness, so that the display quality is improved.
3 Citations
13 Claims
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1. A light guiding plate comprising:
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a light incident side portion into which a light is incident;
a first surface for reflecting the light incident through the light incident side portion, the first surface having a light reflection pattern including a plurality of alternately disposed light reflection planes and non-reflection planes, the light reflection planes facing the light incident side portion so as to reflect the light inputted through the light incident side portion; and
a second surface opposite the first surface, the light reflection plane having an inclined angle with respect to the second surface, the angle being proportional to a distance between the light incident side portion and the light reflection plane. - View Dependent Claims (2, 3, 4, 5)
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6. A liquid crystal display device comprising:
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a lamp assembly generating a light to supply the light in one direction;
a light guiding plate including a light incident side portion into which the light is incident, a first surface for reflecting the light incident through the light incident side portion, the first surface having a light reflection pattern including a plurality of alternately disposed light reflection planes and non-reflection planes, the light reflection planes facing the light incident side portion, and a second surface opposite the first surface, the light reflection plane having an inclined angle with respect to the second surface, the angle being proportional to a distance between the light incident side section and the light reflection plane; and
a liquid crystal display panel assembly for forming an image light including display information by optically modulating the light outputted from the second surface of the light guiding plate. - View Dependent Claims (7, 8, 9, 10)
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11. A method for displaying an image in a liquid crystal display device, comprising:
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inputting a first light having a first optical distribution;
forming a second light having a second optical distribution by continuously reflecting the first light to have a continuously varied reflection angle;
forming a third light having a third optical distribution by transmitting a portion of the second light and reflecting again at least one time a remaining portion of the second light and transmitting the re-reflected second light, depending on the reflection angle; and
forming a fourth light including an information by optically modulating the third light through a liquid crystal. - View Dependent Claims (12, 13)
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Specification