Patent ID: 7764251
Filing Date: 2010-07-27
Classification: G09G

Abstract:
1. A display apparatus comprising: a pixel array section; and a drive section driving the pixel array section, wherein the pixel array section includes a row of first scanning lines and second scanning lines, a column of signal lines, and pixels in a matrix, each of the pixels disposed at an intersection of each of the first scanning lines and each of the signal lines, the drive section outputs control signals to the row of first scanning lines and second scanning lines, respectively, to perform line progressive scanning on the pixels for each row, and supplies a signal potential and a predetermined off potential to a column of signal lines in synchronism with the line progressive scanning, the pixel includes a light emitting device, a sampling transistor, a driving transistor, a switching transistor, and a holding capacitor, the sampling transistor has a control terminal connected to the first scanning line and a pair of current terminals, one of the current terminals is connected to the signal line, and the other current terminal is connected to a control terminal of the driving transistor, the driving transistor has a pair of current terminals, one of the current terminals is connected to a power source, and the other current terminals is connected to the light emitting device, the switching transistor has a control terminal connected to the second scanning line and a pair of current terminals, one of the current terminals is connected to a fixed potential, and the other of the current terminals is connected to the other current terminals of the driving transistor, and the holding capacitor has one terminal connected to the control terminal of the driving transistor and the other terminal connected to the other of the current terminals of the switching transistor; and wherein the sampling transistor passes a current in accordance with the control signal supplied from the first scanning line, and samples a signal potential of a video signal supplied from the signal line to hold the signal potential in the holding capacitor, the driving transistor allows a drive current to flow through the light emitting device to change the device to a luminous state in accordance with the held signal potential supplied by the current from the power source, the switching transistor becomes ON in accordance with the control signal supplied from the second scanning signal in advance of the sampling of the video signal to connect the other terminal of the holding capacitor to a fixed potential to change the light emitting device to a non-luminous state, and the sampling transistor becomes ON in accordance with the other control signal supplied from the first scanning line when the switching transistor becomes ON, and takes in the OFF voltage from the signal line to apply the voltage to the control terminal of the driving transistor, thereby preventing a penetration current from flowing from the power source toward the fixed potential.