Patent ID: 8542183

Claim:
A display device, comprising: a display panel; a timing controller; a plurality of signal line drivers to drive display panel signal lines; and a seaming line driver to drive scanning lines on the display panel, wherein the timing controller supplies control data to a specified driver among the signal line drivers, and wherein the specified driver generates scanning line driver control signals to control the scanning line drivers in a response to the control data, and supplies scanning line driver control signals to the scanning line driver, wherein the specified driver includes: a drive circuit to drive the signal lines of the display panel; a control signal generator circuit to generate signal line driver control signals to control the drive circuit from the control data, and to generate the scanning line driver control signals; output pins coupled to the scanning line driver; and a selector to select either the signal line driver control signal or the scanning line driver control signals, wherein the selector is configured to output a selected one of the signal line driver control signal and the scanning line driver control signals from the output pin, and wherein, during a test operation, the selector selects the signal line driver control signal, from the signal line driver control signal and the scanning line driver control signals, and outputs the signal line driver control signal from the output pins.