Organic EL panel
A gate length L of a second TFT ( 21 ) is set longer than the gate length L of a peripheral TFT. This arrangement makes it possible to accurately control even a small current, using the second TFT ( 21 ).
1. An organic EL panel having a plurality of organic EL elements arranged in a matrix, comprising:
a drive transistor provided to each of the plurality of organic EL elements, for controlling a drive current to be supplied to a corresponding organic EL element; and
a peripheral transistor disposed within a peripheral circuit which is formed outside of a display area where the plurality of organic EL elements are arranged, for outputting a signal for controlling the drive transistor,
wherein a gate length of the drive transistor is set longer than a gate length of the peripheral transistor.
2. The organic EL panel according to claim 1 , wherein
the gate length of the peripheral transistor is set to a value between 1 and 10 μm.
3. The organic EL panel according to claim 1 , wherein
the gate length of the drive transistor is set to a value between 10 and 100 μm.
4. The organic EL panel according to claim 1 , wherein
a gate width of the drive transistor and a gate width of the peripheral transistor are set to the same value.
5. An organic EL panel having a plurality of organic EL elements arranged in a matrix, comprising:
a drive transistor provided to each of the plurality of organic EL elements, for controlling a drive current to be supplied to a corresponding organic EL element; and
a peripheral transistor disposed within a peripheral circuit which is formed outside of a display area where the plurality of organic EL elements are arranged, for outputting a signal for controlling the drive transistor,
wherein (a gate length L)/(a gate width W) of the drive transistor is set larger than (a gate length L)/(a gate width W) of the peripheral transistor.
6. The organic EL panel according to claim 5 , wherein
the gate length of the peripheral transistor is set to a value between 1 and 10 μm.
7. The organic EL panel according to claim 5 , wherein
the gate length of the drive transistor is set to a value between 10 and 100 μm.
8. The organic EL panel according to claim 5 , wherein
the gate width of the peripheral transistor is set to a value between 5 and 500 μm.
9. The organic EL panel according to claim 5 , wherein
the gate width of the drive transistor is set to a value between 5 and 10 μm.