Level shifter and display device

Abstract

The invention provides a level shifter and a display device. The level shifter comprises a logic setting unit, a control unit, a first field-effect transistor, a second field-effect transistor, and an overcurrent protection module, wherein an input end of the logic setting unit inputs an initial signal, and an output end of the logic setting unit is connected with an input end of the control unit; the control unit is provided with a first output end and a second output end; a gate of the first field-effect transistor is connected with the first output end, and a high-level voltage is input to a source of the first field-effect transistor; a gate of the second field-effect transistor is connected with the second output end, and a low-level voltage is input to a source of the second field-effect transistor; drains of the first field-effect transistor and the second field-effect transistor are both connected with a main output end; and the overcurrent protection module is used for reducing the resistance of the level shifter at a starting stage of the level shifter, and increasing the resistance of the level shifter at a working stage of the level shifter. The level shifter and the display device provided by the invention have the advantages that voltage rise time can be shortened, and false triggering and screen melting can be avoided.

Description

【Technical field】 [0001] The invention relates to the field of display technology, in particular to a level shift circuit and a display device. 【Background technique】 [0002] The level shifter circuit (Level Shifter) is an important IC used in the array substrate row drive (GOA, Gate Driver on Array) circuit, and its main function is to convert the input logic signal CK-IN into a high-level logic Signal CLK-OUT. Such as figure 1 As shown, the existing level shift circuit includes a logic setting unit 11, a control unit 12, a first field effect transistor Q1 and a second field effect transistor Q2; both the logic setting unit 11 and the control unit 12 are used to set the low power The flat voltage signal is converted into a high-level voltage signal. The gate of the first field effect transistor Q1 is connected to the first output terminal 121 of the control unit 12, and its source is connected to the high-level voltage VGH. The second field effect transistor Q1 The gate...

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Problems solved by technology

However, due to the series resistance, it will affect the voltage rise time of the Level Shifter, thus reducing the display effect

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