US 2003/0142253 A1 · Translucent reflection type electro-optic devices and methods for manufacturing the same

Abstract

The present invention provides a translucent reflection type electro-optic device that can increase a display light amount in both a reflection mode and a transmission mode, an electronic instrument therewith, and a method of fabricating the translucent reflection type electro-optic device. In a TFT array substrate of a reflection type electro-optic device, on a bottom layer side of a light reflection film, a concavity and convexity formation layer that forms a concavity and convexity pattern can be formed with a first photosensitive resin having a refractive index, n1, on a top layer of the concavity and convexity formation layer a top layer insulating film made of a second photosensitive resin having a refractive index, n2 (n1>n2), is formed, and at a position that overlaps with convexities of the concavity and convexity pattern, a light transmission window is formed. Accordingly, an interface between the concavity and convexity formation layer and the top layer insulating film plays a function as a condenser lens that refracts a light incident from a back surface side toward the light transmission window.

Claims15

Dependent claims

1 A translucent reflection type electro-optic device that includes, on a substrate that holds an electro-optic material:

a concavity and convexity formation layer made of a first light transmitting material formed in a predetermined pattern;
a top layer insulating film made of a second light transmitting material formed on a top layer side of the concavity and convexity formation layer;
a light reflection film formed on a top layer side of the top layer insulating film;
a light transmitting electrode formed on a top layer or a bottom layer of the light reflection film at a top layer side of the top layer insulating film;
a light transmission window that is partially formed in the light reflection film, the light transmission window being plurally formed at positions each of which overlaps with at least part of a plurality of convexities that the concavity and convexity formation layer forms, or with at least part of a plurality of concavities;
and
each of the first light transmitting material and the second light transmitting material having a refractive index that endows an interface between the concavity and convexity formation layer and the top layer insulating film with a lens function that refracts a light entered from a back surface side of the substrate toward the light transmission window.

4 more elements

A method of fabricating a translucent reflection type electro-optic device that includes, on a substrate that holds an electro-optic material:

forming a concavity and convexity formation layer made of a first light transmitting material in a predetermined pattern;
forming a top layer insulating film made of a second light transmitting material on a top layer side of the concavity and convexity formation layer;
forming a light reflection film on a top layer side of the top layer insulating film;
forming a light transmitting electrode on a top layer or a bottom layer of the light reflection film at a top layer side of the top layer insulating film;
forming a light transmission window that is partially in the light reflection film;
plurally forming the light transmission window at positions each of which overlaps with at least part of a plurality of convexities that the concavity and convexity formation layer forms, or with at least part of a plurality of concavities;
and
using, as the first light transmitting material and the second light transmitting material, transparent materials having different refractive indices, and thereby endowing an interface between the concavity and convexity formation layer and the top layer insulating film with a lens function that refracts a light entered from a back surface side of the substrate toward the light transmission window.

5 more elements

Dependencies are inferred from the claim text.

Translucent reflection type electro-optic devices and methods for manufacturing the same

Life of this patent

Translucent reflection type electro-optic devices and methods for manufacturing the same

Life of this patent

Abstract

Claims15