Thin-film transistor panel

Patent metadata

Field	Value
Publication number	US-10825840-B2
Application number	US-201615061291-A
Country	US
Kind code	B2
Filing date	Mar 4, 2016
Priority date	Feb 18, 2009
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

Embodiments of the present disclosure provide a thin-film transistor (TFT) panel structured to prevent the deterioration of image quality due to the luminance change of backlight. According to an embodiment, the TFT panel includes: an insulating substrate; a first gate line and a first data line which are formed on the insulating substrate to be insulated from each other and cross each other; a first subpixel electrode which is formed on the insulating substrate and connected to the first gate line and the first data line by a first TFT; a second subpixel electrode which is formed on the insulating substrate and separated from the first subpixel electrode; a connecting electrode which is directly connected to any one of the first and second subpixel electrodes and capacitively coupled to the other one of the first and second subpixel electrodes; a semiconductor pattern which is formed between the connecting electrode and the insulating substrate; and a light-shielding pattern which is formed between the semiconductor pattern and the insulating substrate, is overlapped by the connecting electrode, and blocks light.

First claim

What is claimed is:

1. A thin-film transistor (TFT) panel comprising:
an insulating substrate;
a first TFT including:
a first gate line including a gate electrode formed on an upper surface of the insulating substrate,
a gate insulating layer formed on the gate electrode, the gate insulating layer including a lower surface facing the insulating substrate and an upper surface opposite to the lower surface,
a semiconductor layer formed on the upper surface of the gate insulating layer,
a first data line having a source electrode that overlaps the semiconductor layer, and
a drain electrode comprising a first end, and a second end wherein the first end of the drain electrode overlaps the semiconductor layer,

a first subpixel electrode formed on the insulating substrate, wherein the second end of the drain electrode is connected to the first subpixel electrode via a contact hole;
a light-shielding pattern that is separate and distinct from the gate electrode and the first gate line;
a second TFT: and
a second subpixel electrode electrically connected to the second TFT,
wherein a channel is formed between the source electrode and the drain electrode;
wherein the drain electrode is disposed between the light-shielding pattern and the pixel electrode,
wherein an area of the drain electrode, that is disposed between and separate from the first end and the second end of the drain electrode, overlaps the light-shielding pattern and is overlapped by the second subpixel electrode,
wherein the semiconductor layer is disposed between the light-shielding pattern and the drain electrode,
wherein the light-shielding pattern and the first gate line are disposed directly on the upper surface of the insulating substrate,
wherein the light-shielding pattern and the first gate line directly contact the lower surface of the gate insulating layer,
wherein the semiconductor layer directly contacts the upper surface of the gate insulating layer, and
wherein the gate electrode, the first gate line, and the light-shielding pattern are made of a same material.

2. The panel of claim 1 , wherein the light-shielding pattern and the first gate line are both disposed between the insulating substrate and the gate insulating layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Na Byoung-Sun
• Lee Ju-Hee
• Lee Won-Hee
• Kwon Ho-Kyoon

Classifications

• H10D30/6723

  having light shields · CPC title

• H10D86/0231

  using masks, e.g. half-tone masks · CPC title

• H10D86/40

  characterised by multiple TFTs · CPC title

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title