Reflective liquid crystal display
AssigneeSanyo Electric Co., Ltd.
InventorKazuto Noritake
Life of this patent
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Abstract
Between a substrate comprising reflective display electrodes each including a flat portion, a slope portion, and a base portion, and TFTs, and an opposing substrate on which a color filter and an opposing electrode is accumulated, and on the side of viewer, a light diffuser layer having the haze value of 33%, a retardation film, and a polarization film are provided, liquid crystal is disposed. The angle of inclination (angle of elevation) of the slope portion with regard to the base portion is greater than 0° and 8° or less. With this structure, it is possible to provide a reflective LCD capable of achieving increased luminance in each display pixel and of providing bright display over a wide range of viewing angles.
Claims34
A reflective liquid crystal display device, comprising:
- liquid crystal provided in a gap between first and second substrates disposed facing each other, said first and second substrates are glass substrates;
- and
- electrodes for driving the liquid crystal for each pixel, which is provided on each of the first and second substrates at the side opposing the liquid crystal,
- wherein, of said electrodes, an electrode formed on said first substrate is a reflective display electrode composed of a conductive reflective material,
- said reflective display electrode includes, for each pixel, a first flat portion on an upper portion, a second flat portion on a base portion, and a slope portion,
- wherein said second flat portion and said slope portion form a concave portion depressed toward said first substrate on a surface opposing the liquid crystal.
A reflective liquid crystal display device, comprising:
- liquid crystal provided in a gap between first and second substrates disposed facing each other, said first and second substrates are glass substrates;
- and
- electrodes for driving the liquid crystal for each pixel, which is provided on each of the first and second substrates at the side opposing the liquid crystal,
- wherein, of said electrodes, an electrode formed on said first substrate is a reflective display electrode composed of a conductive reflective material,
- said reflective display electrode is formed on an insulating film having a portion concave toward said first substrate, over a switching element formed for each pixel,
- said reflective display electrode includes, for each pixel, a first flat portion on an upper portion, a second flat portion on a base portion, and a slope portion,
- wherein said second flat portion and said slope portion form a concave portion depressed from the surface opposing the liquid crystal toward said first substrate.
A reflective liquid crystal display device, comprising:
- liquid crystal provided in a gap between first and second substrates disposed facing each other, said first and second substrates are glass substrates;
- and
- electrodes for driving the liquid crystal for each pixel, which is provided on each of the first and second substrates at the side opposing the liquid crystal,
- wherein, of said electrodes, an electrode formed on said first substrate is a reflective display electrode composed of a conductive reflective material,
- said reflective display electrode includes, for each pixel, a concave portion depressed toward said first substrate on a surface opposing the liquid crystal,
- said concave portion includes a base portion and a slope portion inclined toward said base portion, and
- said slope portion extends in an opposite direction toward a flat portion.
The reflective liquid crystal display device according to 12, wherein the extent of diffusion of said light diffuser has a haze value of between 19% and 70%.
A reflective liquid crystal display device, comprising:
- liquid crystal provided in a gap between first and second substrates disposed facing each other, said first and second substrates are glass substrates;
- and
- electrodes for driving the liquid crystal for each pixel, which is provided on each of the first and second substrates at the side opposing the liquid crystal,
- wherein, of said electrodes, an electrode formed on said first substrate is a reflective display electrode composed of a conductive reflective material,
- said reflective display electrode is formed on an insulating film having a portion concave toward said first substrate, over a switching element formed for each pixel,
- said reflective display electrode includes, for each pixel, a concave portion depressed from the surface opposing the liquid crystal toward said first substrate,
- said concave portion includes a base portion and a slope portion inclined toward said base portion, and
- said slope portion extends in an opposite direction toward a first flat portion.
The reflective liquid crystal display device according to 17, wherein the extent of diffusion of said light diffuser has a haze value of between 19% and 70%.
A reflective liquid crystal display device, comprising:
- liquid crystal provided in a gap between first and second substrates disposed facing each other, said first and second substrates are glass substrates;
- and
- electrodes for driving the liquid crystal for each pixel, which is provided on each of the first and second substrates at the side opposing the liquid crystal,
- wherein, of said electrodes, an electrode formed on said first substrate is a reflective display electrode composed of a conductive reflective material,
- said reflective display electrode includes, for each pixel, a concave portion depressed toward said first substrate on a surface opposing the liquid crystal,
- said concave portion includes a base portion and a slope portion inclined toward said base portion, and
- wherein an angle of elevation of said slope portion with respect to said base portion is greater than 0° and 8° or less.
The reflective liquid crystal display device according to 23, wherein the extent of diffusion of said light diffuser has a haze value of between 19% and 70%.
A reflective liquid crystal display device, comprising:
- liquid crystal provided in a gap between first and second substrates disposed facing each other, said first and second substrates are glass substrates;
- and
- electrodes for driving the liquid crystal for each pixel, which is provided on each of the first and second substrates at the side opposing the liquid crystal,
- wherein, of said electrodes, an electrode formed on said first substrate is a reflective display electrode composed of a conductive reflective material,
- said reflective display electrode is formed on an insulating film having a portion concave toward said first substrate, over a switching element formed for each pixel,
- said reflective display electrode includes, for each pixel, a concave portion depressed from the surface opposing the liquid crystal toward said first substrate,
- said concave portion includes a base portion and a slope portion inclined toward said base portion, and
- wherein an angle of elevation of said slope portion with respect to said base portion is greater than 0° and 8° or less.
The reflective liquid crystal display device according to 26, wherein the extent of diffusion of said light diffuser has a haze value of between 19% and 70%.
A reflective liquid crystal display device, comprising:
- liquid crystal provided in a gap between first and second substrates disposed facing each other, said first and second substrates are glass substrates;
- and
- electrodes for driving the liquid crystal for each pixel, which is provided on each of the first and second substrates at the side opposing the liquid crystal,
- wherein, of said electrodes, an electrode formed on said first substrate is a reflective display electrode composed of a conductive reflective material,
- said reflective display electrode includes, for each pixel, a concave portion depressed toward said first substrate on a surface opposing the liquid crystal, and
- said reflective display electrode is shaped so as to have only a continuous slope portion and a base portion.
The reflective liquid crystal display device according to 30, wherein the extent of diffusion of said light diffuser has a haze value of between 19% and 70%.
A reflective liquid crystal display device, comprising:
- liquid crystal provided in a gap between first and second substrates disposed facing each other, said first and second substrates are glass substrates;
- and
- electrodes for driving the liquid crystal for each pixel, which is provided on each of the first and second substrates at the side opposing the liquid crystal,
- wherein, of said electrodes, an electrode formed on said first substrate is a reflective display electrode composed of a conductive reflective material,
- said reflective display electrode is formed on an insulating film having a portion concave toward said first substrate, over a switching element formed for each pixel,
- said reflective display electrode includes, for each pixel, a concave portion depressed from the surface opposing the liquid crystal toward said first substrate, and
- said reflective display electrode is shaped so as to have only a continuous slope portion and a base portion.
The reflective liquid crystal display device according to 33, wherein the extent of diffusion of said light diffuser has a haze value of between 19% and 70%.
Dependencies are inferred from the claim text.