Flat panel display
View Patent ↗The claimed invention is directed to a flat panel display having R, G, and B unit pixels. At least one of the R, G, and B unit pixels includes at least two or more transistors, each having source and drain regions. At least one drain region in the source/drain regions of at least one transistor in the transistors has a resistance value different from a resistance value of at least a drain region of the other transistor. The difference in resistance values may be accomplished by doping each drain region with a different concentration of dopant or by shaping each drain region differently.
1. A flat panel display comprising R, G and B unit pixels, wherein at least one unit pixel of the R, G and B unit pixels includes at least a switching transistor comprising a first gate region, and a driving transistor comprising a second gate region,
wherein the first gate region is a channel region under a gate electrode of the switching transistor, and the second gate region is an offset region between two channel regions under a gate electrode of the driving transistor as well as the two channel regions, and
wherein the resistance value of the first gate region is different from a resistance value of the second gate region.
2. The flat panel display according to claim 1 , wherein the gate regions of the at least one transistor and the other transistor have resistance values which are different from each other by doping concentration difference of the gate regions.
3. The flat panel display according to claim 2 , wherein the gate region of the at least one transistor is a region on which low concentration impurities are doped as a whole or partially, or a region on which impurities are not doped.
4. The flat panel display according to claim 1 , wherein the gate regions of the at least one transistor and the other transistor have resistance values which are different from each other by shape difference of the gate regions.
5. The flat panel display according to claim 4 , wherein the gate region of the at least one transistor is formed in a zigzag shape.
6. The flat panel display according to claim 4 , wherein the gate region of the at least one transistor has a longer length or narrower width compared with gate region of the other transistor.
7. The flat panel display according to claim 2 , wherein the at least one transistor includes multiple gates, and an offset region of high resistance between the multiple gates.