Patent ID: 7061452

Claim:
A spontaneous light-emitting display device comprising: a vertical scanning line, first and second horizontal scanning lines, and a power line corresponding to the vertical scanning line, a first transistor proximate an intersection of the vertical scanning line and the first horizontal scanning line and controlled by potential on the vertical scanning line, a capacitor connected to the first horizontal scanning line through the first transistor, a second transistor connected to the first horizontal scanning line through the first transistor and controlled by potential on the first horizontal scanning line, a light-emitting element connected to the power line through the second transistor, a light-detecting element and a resistor connected in series between the vertical scanning line and the power line, and a third transistor having a control terminal at an electrical potential of a node of the light-detecting element and the resistor, wherein the power line is connected to the second horizontal scanning line through the third transistor, and the light-detecting element detects light emitted by the light-emitting element.