Gate Driving Circuit Multi-Voltage Generation
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Solution Overview
Problem
Existing gate driving circuits, particularly in liquid crystal displays, are limited in generating a variety of gate driving voltages, which affects the display effect, especially in special frames or 3D modes.
Innovation Solution
A gate driving circuit with a controlling circuit comprising multiple sub-controlling circuits, each connected to a gate pulse modulator, utilizing field effect transistors and voltage division resistors to control conduction based on level signals from a power source, enabling the generation of multiple gate driving voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a gate pulse modulator is used to generate gate driving voltage, then the circuit is simple and easy to manufacture, but it can only generate a single gate driving voltage and cannot support special frame or 3D mode displays
Solution Approach 1:
The controlling circuit is divided into multiple sub-controlling circuits (first sub-controlling circuit, second sub-controlling circuit, etc.), each capable of independently controlling the connection between the gate pulse modulator and the output terminal. This segmentation allows different voltage levels to be generated by activating different sub-circuits, thereby achieving multi-voltage output capability while maintaining relatively simple individual circuit units.
Solution Approach 2:
The circuit employs dynamic switching mechanisms using field effect transistors to connect or disconnect the gate pulse modulator to the output terminal based on control signals. This dynamic control enables the circuit to switch between different voltage outputs (e.g., first gate driving voltage and second gate driving voltage) according to display mode requirements, providing adaptability without requiring multiple fixed voltage generation circuits.
2Adaptability or versatility
If multiple sub-controlling circuits are added to generate multiple gate driving voltages, then the display versatility is improved, but the device complexity increases
Solution Approach 1:
Each sub-controlling circuit is designed with multi-functionality, serving both as a voltage selection mechanism and as a control element for the gate pulse modulator. The field effect transistors in each sub-circuit simultaneously perform switching and voltage regulation functions. This universal design reduces the need for separate dedicated components, thereby supporting multiple display modes while limiting the increase in overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for the generation of multiple gate driving voltages, enhancing the display effect of liquid crystal displays by controlling conduction between sub-controlling circuits and the gate pulse modulator, thereby improving the display quality in various modes.
Implementation Method 1
each sub controlling circuit controls a conduction between each sub controlling circuit and the gate pulse modulator according to the level signal
Data Source
AI summary
A gate driving circuit and a liquid crystal display are provided, wherein the gate driving circuit comprises a gate pulse modulator and a controlling circuit, the controlling circuit comprises at least one sub controlling circuit; an input terminal of each sub controlling circuit of the at least one sub controlling circuit is connected to an output terminal of the gate pulse modulator; an output terminal of each sub controlling circuit is connected to a power source; the power source outputs a level signal to each sub controlling circuit; each sub controlling circuit controls a conduction between each sub controlling circuit and the gate pulse modulator according to the level signal, so as to control the gate driving circuit to output at least one gate driving voltage. The present disclosure may generate a plurality of gate driving voltages, thereby increasing the display effect of the liquid crystal display.