Gate drive circuit with forward and reverse scan function

Abstract

The invention discloses a gate drive circuit with forward and reverse scan functions, including a forward scan pre-charge module, a reverse scan pre-charge module, a pull-up module, a gate scan signal maintenance module, and a pull-up control node Sustain block, auxiliary block, clear reset block and bootstrap capacitor. The gate drive circuit of the present invention can realize forward and reverse scan functions; the forward scan prefill module can be used as a pull-up control node pull-down emptying module during reverse scan, and the reverse scan prefill module can be used as forward scan The pull-down clearing module of the pull-up control node; the maintenance module of the pull-up control node can be maintained during forward scanning or reverse scanning; the above design can reduce the number of components and reduce space to achieve narrow Border design.

Description

technical field [0001] The invention relates to a gate drive circuit, in particular to a gate drive circuit with forward and reverse scanning functions. Background technique [0002] In some special applications, the liquid crystal display needs to have the function of forward and reverse scanning. For example, the display screen of the mobile phone screen can be displayed normally or upside down. Bottom-up scanning is also possible. Such as figure 1 Shown is the current mainstream gate drive circuit, which cannot perform reverse scanning. Because the maintenance module of the pull-up control node netAn in this circuit is controlled by the previous clock signal, if the reverse scan is performed, the pull-up control node netAn cannot be maintained; the pull-down clear module of the pull-up control node netAn uses the subsequent stage Gate scan signal G n+3 is controlled, and the pre-charge module uses the gate scan signal G of the previous stage n-2 For control, the cont...

AI Technical Summary

Problems solved by technology

like figure 1 Shown is the current mainstream gate drive circuit, which cannot perform reverse scanning

Because the maintenance module of the pull-up control node netAn in this circuit is controlled by the previous clock signal, if the reverse scan is performed, the pull-up control node netAn cannot be maintained; the pull-down clearing module of the pull-up control node netAn uses the subsequent stage Gate scan signal G n+3 is controlled, and the pre-charge module uses the gate scan signal G of the previous stage n-2 For control, the control signal is asymmetrical, and if reverse scanning is performed, the circuit cannot operate normally

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