Reflection type liquid-crystal display unit
First Claim
1. A reflection type liquid-crystal display unit comprising:
- a light guide plate having an upper surface, a lower surface and a light incident surface, said light guide plate being provided with a light emitting means constituted by prismatic irregularities formed on said upper surface, so that incident light from said incidence side surface is emitted from said lower surface by reflection of said light emitting means, and the light emitted from said lower surface takes maximum intensity in a direction at an angle of 30 degrees or less with respect to a normal to a reference plane defmed by said lower surface, while maximum intensity of leakage light from said upper surface in said direction at an angle of 30 degrees or less is not larger than ⅕
of the maximum intensity in said lower surface, while incident light from said lower surface is transmitted from said upper surface; and
a liquid-crystal display element provided with a reflection layer and disposed in contact on said lower surface of said light guide plate through a bonding layer, said bonding layer having a refractive index in a range of from 1.40 to 1.55 and whole light transmittivity in a range of not less than 90%.
1 Assignment
0 Petitions
Accused Products
Abstract
A reflection type liquid-crystal in which a light guide plate is in tight contact with a liquid-crystal display element having a reflecting layer through a bonding layer with refractive index in a range of from 1.40 to 1.55 and whole light transmittivity in a range of not less than 90%, the light guide plate being designed so that incident light from an incidence side surface is emitted from a lower surface through prismatic irregularities formed on an upper surface, and the light emitted from the lower surface takes maximum intensity at an angle of 30 degrees or less with respect to a normal to a plane of the lower surface, while maximum intensity of leakage light from the upper surface at that angle is not larger than ⅕ of the maximum intensity in the lower surface, and incident light from the lower surface is transmitted from the upper surface.
-
Citations
8 Claims
-
1. A reflection type liquid-crystal display unit comprising:
-
a light guide plate having an upper surface, a lower surface and a light incident surface, said light guide plate being provided with a light emitting means constituted by prismatic irregularities formed on said upper surface, so that incident light from said incidence side surface is emitted from said lower surface by reflection of said light emitting means, and the light emitted from said lower surface takes maximum intensity in a direction at an angle of 30 degrees or less with respect to a normal to a reference plane defmed by said lower surface, while maximum intensity of leakage light from said upper surface in said direction at an angle of 30 degrees or less is not larger than ⅕
of the maximum intensity in said lower surface, while incident light from said lower surface is transmitted from said upper surface; and
a liquid-crystal display element provided with a reflection layer and disposed in contact on said lower surface of said light guide plate through a bonding layer, said bonding layer having a refractive index in a range of from 1.40 to 1.55 and whole light transmittivity in a range of not less than 90%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification