Patent ID: 8081148
Filing Date: 2011-12-20
Classification: G02F,G09G

Abstract:
1. A display device comprising: a substrate; a plurality of pixels formed in a pixel part; and a plurality of video lines which applies video voltages to the plurality of pixels; wherein an electrostatic protective circuit for protecting the pixel part is connected to the plurality of video lines; wherein the electrostatic protective circuit for protecting the pixel part is connected between the plurality of video lines; wherein an electrostatic protective circuit for protecting a peripheral circuit is connected between at least one video line and a reference voltage line to which a reference voltage is applied; wherein the electrostatic protective circuit for protecting the pixel part is constituted of a pair of diodes which has cathodes thereof connected to each other; wherein the electrostatic protective circuit for protecting the peripheral circuit is constituted of first to fourth diodes which are connected in series; wherein the first diode and the second diode have cathodes thereof connected to each other; wherein the third diode and the fourth diode have cathodes thereof connected to each other; wherein the diode is a diode-connected MOS transistor; and wherein the diode-connected MOS transistor which constitutes the first to fourth diodes which are connected in series has a gate width thereof set larger than a gate width of the diode-connected MOS transistor which constitutes the pair of diodes.