Display device and drive method thereof

• Main Authors: IWAMOTO AKIHISA, OZAKI MASAMI, NISHIMURA TOMOHIKO, SAITOH KOHJI, UEHATA MASAKI, NAKATA JUN
• Format: Patent
• Language: English
• Published: 17.06.2015
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; EDUCATION; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

A gate driver (24), which is an IGZO-GDM, and a level shifter circuit (13) are connected to each other via first through fifth wires (OL1-OL5). Electric discharge units (190) are connected to the wires (OL). In a power source off sequence for removing residual electrical charge in a panel, when a power source of first through fifth output circuits (OC1-OC5) in the level shifter circuit (13) falls below an activation lower limit value, the outputs of the first through fifth output circuits (OC1-OC5) reach a state of high impedance. At this time, the electric potentials of the wires (OL) are drawn to ground potential by the electric discharge units (190). Consequently, residual electric charge in the panel can be removed quickly and stably when the power source is blocked.