Flat panel display
View Patent ↗The present invention discloses a high-speed flat panel display with a long lifetime, wherein thin film transistors in a pixel array portion in which a plurality of pixels are arranged and a driving circuit portion for driving the pixels of the pixel array portion, have different resistance values than each other or have different geometric structures than each other. The flat panel display comprises a pixel array portion where a plurality of pixels are arranged, and a driving circuit portion for driving the pixels of the pixel array portion. The thin film transistors in the pixel array portion and the driving circuit portion have different resistance values in their gate regions or drain regions than each other, or have different geometric structures than each other. One of the thin film transistors in the pixel array portion and the thin film transistors in the driving circuit has zigzag shape in its gate region or drain region or has an offset region.
1. A flat panel display, comprising:
a pixel array portion having a plurality of pixels arranged thereon; and
a driving circuit portion for driving the plurality of pixels of the pixel array portion,
wherein a thin film transistor in the pixel array portion comprises a plurality of channel regions corresponding to multiple gates and has a different resistance value than a thin film transistor in the driving circuit portion,
wherein the plurality of channel regions comprises a first channel region and a second channel region, the thin film transistor in the pixel array portion further comprises a first source/drain region directly contacting the first channel region, a second source/drain region directly contacting the second channel region, and an offset region, and
wherein the offset region directly contacts the first channel region and the second channel region and has a lower doping concentration than a doping concentration of the first source/drain region and a doping concentration of the second source/drain region.
2. The flat panel display according to claim 1 , wherein the pixel array portion and the driving circuit portion each has a plurality of thin film transistors and where at least one thin film transistor of the plurality of thin film transistors in the pixel array portion has a resistance value higher than any of the plurality of thin film transistors in the driving circuit portion.
3. A flat panel display, comprising:
a pixel array portion having a plurality of pixels arranged thereon; and
a driving circuit portion for driving the plurality pixels of the pixel array portion,
wherein a thin film transistor in the pixel array portion comprises a plurality of channel regions corresponding to multiple gates and has a different resistance value in its gate region than a thin film transistor in the driving circuit portion,
wherein the plurality of channel regions comprises a first channel region and a second channel region, the thin film transistor in the pixel array portion further comprises a first source/drain region directly contacting the first channel region, a second source/drain region directly contacting the second channel region, and an offset region, and
wherein the offset region directly contacts the first channel region and the second channel region and has a lower doping concentration than a doping concentration of the first source/drain region and a doping concentration of the second source/drain region.
4. The flat panel display according to claim 3 , wherein the offset region is positioned directly between the first channel region and the second channel region, the offset region having a higher resistance than a thin film transistor in the driving circuit portion.
5. The flat panel display according to claim 4 , where the one thin film transistor of the thin film transistors in the pixel array portion and the driving circuit portion further includes source/drain regions, and
the offset region is a high resistance region, which is one of not doped, entirely doped and/or partially doped with impurities with the same conductivity type as the source/drain regions and has a lower concentration than the source/drain regions.
6. A flat panel display, comprising:
a pixel array portion having a plurality of pixels arranged thereon; and
a gate driving circuit portion and a data driving circuit portion for driving the plurality of pixels of the pixel array portion,
wherein at least one thin film transistor of a plurality of thin film transistors in the pixel array portion comprises a plurality of channel regions corresponding to multiple gates has a different resistance value from at least one thin film transistor of a plurality of thin film transistors in the gate driving circuit portion and the data driving circuit portion,
wherein the plurality of channel regions comprises a first channel region and a second channel region, the thin film transistor in the pixel array portion further comprises a first source/drain region directly contacting the first channel region, a second source/drain region directly contacting the second channel region, and an offset region, and
wherein the offset region directly contacts the first channel region and the second channel region and has a lower doping concentration than a doping concentration of the first source/drain region and a doping concentration of the second source/drain region.
7. The flat panel display according to claim 6 , wherein the offset region is positioned directly between the first channel region and the second channel region.
8. The flat panel display according to claim 7 , wherein the at least one thin film transistor of the plurality of thin film transistors in the pixel array portion further includes source/drain regions, and
the offset region is a high resistance region, which is one of not doped, entirely doped and partially doped with a low concentration of impurities of the same conductivity type as the source/drain regions.
9. The flat panel display according to claim 6 , wherein the at least one thin film transistor of the plurality of thin film transistors in the pixel array portion includes an offset region at least in its drain region.
10. The flat panel display according to claim 9 , wherein the offset region of the at least one thin film transistor in the pixel array portion is a high resistance region, which is one of not doped, entirely doped and partially doped with a low concentration of impurities of the same conductivity type as the drain region.