Backlighted liquid crystal display
First Claim
1. A liquid crystal display device comprising:
- a liquid crystal panel having a length and a width;
an elongated light source means for illuminating said liquid crystal display panel;
a light passage member of one of a transparent and a translucent material, said light passage member being disposed between said liquid crystal panel and said light source means and formed with a recess in the light inlet surface facing said light source means, said light passage member being substantially as wide as said liquid crystal panel, said recess being adapted to provide backlighting of uniform intensity, said recess and said elongated light source means being substantially as long as said light passage member and said liquid crystal panel are wide;
and a light reflection member substantially surrounding said light reflecting member having an opening facing said liquid crystal display panel to expose a surface portion of said light passage member.
1 Assignment
0 Petitions
Accused Products
Abstract
A liquid crystal display panel having a backlight for providing high brightness, uniformity of illumination intensity, small thickness, high efficiency and which can be manufactured at a low cost. The display device includes a liquid crystal display panel, a light source for illuminating the liquid crystal panel, a light passage member which can be formed of either transparent or translucent material disposed between the liquid crystal panel and the light source. The light source inlet side of the light passage member is formed with a recess so that the thickness is reduced at the region opposed to the brightest region of the light source. A light reflecting member substantially surrounds the light source and the light passage member is formed with an opening facing the liquid crystal panel to expose a surface portion of the light passage member. The light source can either be incandescent light bulb or a cold-cathode discharge tube. In the latter case, a thermistor is coupled in series with the tube to stabilize its temperature and hence stabilize the illumination intensity against changes in ambient temperature.
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Citations
11 Claims
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1. A liquid crystal display device comprising:
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a liquid crystal panel having a length and a width; an elongated light source means for illuminating said liquid crystal display panel; a light passage member of one of a transparent and a translucent material, said light passage member being disposed between said liquid crystal panel and said light source means and formed with a recess in the light inlet surface facing said light source means, said light passage member being substantially as wide as said liquid crystal panel, said recess being adapted to provide backlighting of uniform intensity, said recess and said elongated light source means being substantially as long as said light passage member and said liquid crystal panel are wide; and a light reflection member substantially surrounding said light reflecting member having an opening facing said liquid crystal display panel to expose a surface portion of said light passage member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification