Display apparatus, method of manufacturing display apparatus, and electronic apparatus
View Patent ↗A display apparatus includes a plurality of pixels each including an electro-optic element, a writing transistor writing a video signal into the pixel, a holding capacitor holding the video signal written by the writing transistor, and a driving transistor driving the electro-optic element based on the video signal held in the holding capacitor. The driving transistor includes a channel region, a gate electrode disposed opposite to the channel region, a first source/drain region closer to a power source, a second source/drain region closer to the electro-optic element, and impurity regions disposed between the channel region and the first and second source/drain regions and having a lower concentration than that of the corresponding source/drain region. The impurity region disposed between the channel region and the first source/drain region is formed in a region other than a region facing the gate electrode.
1. A display apparatus comprising a plurality of pixels each pixel including an electro-optic element, a writing transistor to write a video signal into the pixel, a holding capacitor to hold the video signal written by the writing transistor, and a driving transistor to drive the electro-optic element based at least in part on the video signal held in the holding capacitor, wherein the driving transistor includes:
a channel region,
a gate electrode disposed opposite to the channel region,
a first source/drain region closer to a power source,
a second source/drain region closer to the electro-optic element, and
impurity regions disposed between the channel region and the first and second source/drain regions and having a lower concentration than that of the corresponding source/drain regions, and
wherein the impurity region disposed between the channel region and the first source/drain region is formed in a region other than a region facing the gate electrode;
wherein a part of the impurity region disposed between the channel region and the second source/drain region is formed in a region facing the gate electrode.
2. The display apparatus according to claim 1 , wherein the driving transistor is a bottom gate type transistor in which the gate electrode is disposed closer to a substrate than the channel region.
3. The display apparatus according to claim 2 ,
wherein there is a parasitic capacitance between the gate electrode and the impurity region disposed between the channel region and the second source/drain region, and
wherein a capacitance value of the parasitic capacitance is one of multiple parameters used to determine a gain in a bootstrap operation in which a gate potential is varied on a track of a source potential of the driving transistor when the writing transistor is in a non-conductive state.
4. The display apparatus according to claim 3 , wherein the source potential of the driving transistor is varied according to a current flowing in the driving transistor.