Substrate for reflection type liquid crystal display element
First Claim
1. A substrate for a reflection type liquid crystal display element, comprising:
- a transparent substrate; and
a reflective mirror formed on top of said transparent substrates, wherein said reflective mirror comprises a predetermined number of high-refractive-index first transparent films composed of a first dielectric material and low-refractive-index second transparent films composed of a second dielectric material laminated alternately on said transparent substrate, and wherein either or both of said first transparent films and said second transparent films are arranged such that a film thickness thereof increases progressively or decreases progressively with distance from said transparent substrate, and a difference between maximum and minimum values of light reflectance is not more than about 10% at wavelengths corresponding to each of red, green, and blue components of visible light so that said reflective mirror is substantially free of ripples in an optical reflection spectrum or optical transmission spectrum across a visible region.
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Accused Products
Abstract
A substrate for reflection type liquid crystal display elements is provided, which has a multilayer dielectric film (reflective mirror) which can have fewer layers than according to the conventional art and can thus be formed in a shorter time, and which can stably obtain an optical characteristic of a desired flatness across the visible region, and moreover can prevent the occurrence of coloring due to reflection. The reflective mirror is formed on top of a transparent substrate, and is comprised of a predetermined number of high-refractive-index first transparent films and low-refractive-index second transparent films laminated alternately on the transparent substrate. Either or both of the first transparent films and the second transparent films are arranged such that the film thickness thereof increases progressively or decreases progressively with distance from the transparent substrate.
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Citations
10 Claims
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1. A substrate for a reflection type liquid crystal display element, comprising:
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a transparent substrate; and
a reflective mirror formed on top of said transparent substrates, wherein said reflective mirror comprises a predetermined number of high-refractive-index first transparent films composed of a first dielectric material and low-refractive-index second transparent films composed of a second dielectric material laminated alternately on said transparent substrate, and wherein either or both of said first transparent films and said second transparent films are arranged such that a film thickness thereof increases progressively or decreases progressively with distance from said transparent substrate, and a difference between maximum and minimum values of light reflectance is not more than about 10% at wavelengths corresponding to each of red, green, and blue components of visible light so that said reflective mirror is substantially free of ripples in an optical reflection spectrum or optical transmission spectrum across a visible region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification