US 2015/0102990 A1 · GATE DRIVING CIRCUIT, AND ARRAY SUBSTRATE AND DISPLAY PANEL THEREOF

Abstract

The present invention relates to a gate driving circuit, and an array substrate and a display panel thereof, wherein gate driving circuit includes multi-level gate driving units. A gate driving unit of each level comprises a starting unit, an energy storage unit, a pull-up unit, a first pull-down unit, a second pull-down unit and a third pull-down unit, wherein the second pull-down unit is coupled to the energy storage unit and a gate line, and configured to intermittently generate a second control signal based on a driving voltage, a clock pulse signal and a second reference voltage, and to pull the driving voltage and a gate signal on the gate line down to the second reference voltage. In addition, to prevent leakage current between the first reference voltage and the second reference voltage from causing burnout of a chip for reference voltage supply, a transistor between the first reference voltage and the second reference voltage, through which the leakage current possibly passes, is modified to be a plurality of transistors in series connection, such that the possibility of current leakage is reduced. Therefore, the gate driving circuit and the array substrate thereof provided in the present invention have improved reliability and longer service life, and can be applied to various display panels.

Claims20

Dependent claims

A gate driving circuit, including multi-level gate driving units, wherein a gate driving unit of each level outputs a gate signal through a gate line coupled thereto, the gate driving unit of each level comprising:

a starting unit configured to transmit an enabling signal;
an energy storage unit coupled to the starting unit and configured to receive the enabling signal, execute a charging procedure based on the enabling signal, and output a driving voltage;
a pull-up unit coupled to the energy storage unit and the gate line, and configured to receive the driving voltage, and pull up the gate signal on the gate line based on the driving voltage and a clock pulse signal;
a first pull-down unit coupled to the energy storage unit and the gate line, and configured to pull the driving voltage and the gate signal down to a first reference voltage based on a first control signal;
and
a second pull-down unit coupled to the energy storage unit and the gate line, and configured to intermittently generate a second control signal based on the driving voltage, the clock pulse signal as well as a second reference voltage, and based on the second control signal, to pull down the driving voltage to the second reference voltage and pull down the gate signal to the first reference voltage.

3 more elements

An array substrate, including a gate driving circuit with multi-level gate driving units, wherein a gate driving unit of each level outputs a gate signal through a gate line coupled thereto, the gate driving unit of each level comprising:

a starting unit configured to transmit an enabling signal;
an energy storage unit coupled to the starting unit and configured to receive the enabling signal, execute a charging procedure based on the enabling signal, and output a driving voltage;
a pull-up unit coupled to the energy storage unit and the gate line, and configured to receive the driving voltage, and pull up the gate signal on the gate line based on the driving voltage and a clock pulse signal;
a first pull-down unit coupled to the energy storage unit and the gate line, and configured to pull the driving voltage and the gate signal down to a first reference voltage based on a first control signal;
and
a second pull-down unit coupled to the energy storage unit and the gate line, and configured to intermittently generate a second control signal based on the driving voltage, the clock pulse signal as well as a second reference voltage, and based on the second control signal, to pull down the driving voltage to the second reference voltage and pull down the gate signal to the first reference voltage.

3 more elements

A display panel including an array substrate, the array substrate including a gate driving circuit with multi-level gate driving units, wherein a gate driving unit of each level outputs a gate signal through a gate line coupled thereto, the gate driving unit of each level comprising:

a starting unit configured to transmit an enabling signal;
an energy storage unit coupled to the starting unit and configured to receive the enabling signal, execute a charging procedure based on the enabling signal, and output a driving voltage;
a pull-up unit coupled to the energy storage unit and the gate line, and configured to receive the driving voltage, and pull up the gate signal on the gate line based on the driving voltage and a clock pulse signal;
a first pull-down unit coupled to the energy storage unit and the gate line, and configured to pull the driving voltage and the gate signal down to a first reference voltage based on a first control signal;
and
a second pull-down unit coupled to the energy storage unit and the gate line, and configured to intermittently generate a second control signal based on the driving voltage, the clock pulse signal as well as a second reference voltage, and based on the second control signal, to pull down the driving voltage to the second reference voltage and pull down the gate signal to the first reference voltage.

3 more elements

Dependencies are inferred from the claim text.

Gate driving circuit, and array substrate and display panel thereof

Life of this patent

Gate driving circuit, and array substrate and display panel thereof

Life of this patent

Abstract

Claims20