Light shielding structure of a substrate for a liquid crystal device, liquid crystal device and projection type display device
DCFirst Claim
Patent Images
1. A substrate for a liquid crystal devices comprising:
- a plurality of data lines formed on the substrate;
a plurality of scan lines crossing the plurality of data lines;
a plurality of thin film transistors connected to the plurality of data lines and the plurality of scan lines;
a plurality of pixel electrodes connected to the plurality of thin film transistors;
a first light shielding film extending along the scan lines, formed at least below a channel region of the thin film transistors, and below junctions between the channel region and a source region and between the channel region and a drain region of the thin film transistors; and
a second light shielding film formed above the channel region and the junctions between the channel region and the source region and between the channel region and the drain region, a width of the second light shielding film being more than a width of the first light shielding film.
1 Assignment
Litigations
0 Petitions
Accused Products
Abstract
Placement of a first light shielding film at least below the channel region of a TFT which drives a pixel, and of a second light shielding film above the same prevents impingement of light coming from above or from below on that channel region. Further, a second light shielding film is formed to cover the channel region and the first light shielding film, thereby to prevent the surface of the first light shielding film from direct exposure to light.
-
Citations
25 Claims
-
1. A substrate for a liquid crystal devices comprising:
-
a plurality of data lines formed on the substrate;
a plurality of scan lines crossing the plurality of data lines;
a plurality of thin film transistors connected to the plurality of data lines and the plurality of scan lines;
a plurality of pixel electrodes connected to the plurality of thin film transistors;
a first light shielding film extending along the scan lines, formed at least below a channel region of the thin film transistors, and below junctions between the channel region and a source region and between the channel region and a drain region of the thin film transistors; and
a second light shielding film formed above the channel region and the junctions between the channel region and the source region and between the channel region and the drain region, a width of the second light shielding film being more than a width of the first light shielding film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A substrate for a liquid crystal device, comprising:
-
a plurality of data lines formed on the substrate;
a plurality of scan lines crossing the plurality of data lines;
a plurality of thin film transistors connected to the plurality of data lines and the plurality of scan lines;
a plurality of pixel electrodes connected to the plurality of thin film transistors;
a first light shielding film formed at least below a channel region of the thin film transistors, and below junctions between the channel region and a source region and between the channel region and a drain region of the thin film transistors; and
a second light shielding film formed above the channel region and the junctions between the channel region and the source region and between the channel region and the drain region; and
a first lead extending from the first light shielding film electrically connected to a constant potential line outside a pixel display region, a width of the first lead extending from the first light shielding film being less than a width of the scan line formed above the first light shielding film. - View Dependent Claims (21)
-
-
22. A substrate for a liquid crystal device, comprising:
-
a plurality of data lines formed on the substrate;
a plurality of scan lines crossing the plurality of data lines;
a plurality of thin film transistors connected to the plurality of data lines and the plurality of scan lines;
a plurality of pixel electrodes connected to the plurality of thin film transistors;
a first light shielding film extending along the data lines, formed at least below a channel region of the thin film transistors, and below junctions between the channel region and a source region and between the channel region and a drain region of the thin film transistors; and
a second light shielding film formed above the channel region and the junctions between the channel region and the source region and between the channel region and the drain region, a width of the second light shielding film being more than a width of the first light shielding film.
-
-
23. A liquid crystal device, comprising:
-
a first substrate;
a second substrate; and
liquid crystal disposed in a space between the first substrate and the second substrate, the first substrate including;
a plurality of data lines formed above the first substrate;
a plurality of scan lines crossing the plurality of data lines;
a plurality of thin film transistors connected to the plurality of data lines and the plurality of scan lines;
a plurality of pixel electrodes connected to the thin film transistors;
a first light shielding film extending at least along the scan lines, formed at least below a channel region of the thin film transistors, and below junctions between the channel region and a source region and between the channel region and a drain region; and
a second light shielding film formed above the channel region, and above the junctions between the channel region and the source region and between the channel region and the drain region, the second substrate including;
an opposite electrode formed above the second substrate; and
a third light shielding film formed in correspondence with at least the thin film transistors, a width of the first light shielding film being less than a width of the second light shielding film and the third light shielding film.
-
-
24. A liquid crystal device, comprising:
-
a first substrate;
a second substrate; and
liquid crystal disposed in a space between the first substrate and the second substrate, the first substrate including;
a plurality of data lines formed above the first substrate;
a plurality of scan lines crossing the plurality of data lines;
a plurality of thin film transistors connected to the plurality of data lines and the plurality of scan lines;
a plurality of pixel electrodes connected to the thin film transistors;
a first light shielding film extending at least along the data lines, formed at least below a channel region of the thin film transistors, and below junctions between the channel region and a source region and between the channel region and a drain region; and
a second light shielding film formed above the channel region, and above the junctions between the channel region and the source region and between the channel region and the drain region, the second substrate including;
an opposite electrode formed above the second substrate; and
a third light shielding film formed in correspondence with at least the thin film transistors, a width of the first light shielding film being less than a width of the second light shielding film and the third light shielding film.
-
-
25. A liquid crystal device having a first substrate, a second substrate and liquid crystal disposed in a space between the first substrate and the second substrate, the liquid crystal device comprising:
-
a plurality of switching elements formed above the first substrate;
a plurality of pixel electrodes arranged in a matrix and connected to the switching elements;
an upper light shielding film formed above the switching elements and above a region between the pixels; and
a lower light shielding film positioned inside of the upper light shielding film, formed below the switching elements and below the region between the pixels.
-
Specification