LCD Driving Voltage Adjustment for Stable Gate Signals
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Solution Overview
Problem
Liquid crystal display (LCD) devices experience abnormal gate signal output and varying charging rates of pixel electrodes when driven at different frequencies, leading to inefficiencies in light transmission and image quality.
Innovation Solution
A method of driving LCD devices involves receiving a reference clock signal and frequency determination data to calculate a pixel driving clock frequency, generating a gate driving clock signal, and outputting driving voltages that increase with the pixel driving clock frequency, ensuring stable gate and data voltages are maintained across frequency changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the LCD device is driven at different frequencies, then the productivity is improved, but the gate signal output becomes abnormal and the charging rate of pixel electrodes varies
Solution Approach 1:
The patent implements dynamic adjustment of gate driving clock frequency and driving voltage based on the pixel driving clock frequency. The system determines the pixel driving clock frequency from input image data signal characteristics, then dynamically sets the gate driving clock frequency and driving voltage to match, ensuring stable gate signal output across different operating conditions rather than using a fixed frequency approach
Solution Approach 2:
The patent changes the gate driving clock frequency and driving voltage parameters according to the determined pixel driving clock frequency. By adjusting these parameters dynamically to match the pixel clock frequency, the system maintains reliable gate signal output while accommodating different driving frequencies and improving overall productivity
2Productivity
If the LCD device is driven at different frequencies, then the productivity is improved, but the charging rate of pixel electrodes varies
Solution Approach 1:
The system dynamically adjusts the driving voltage based on the determined pixel driving clock frequency. By making the driving voltage adaptive to the operating frequency, the system maintains consistent charging rates across different productivity levels rather than using a static voltage approach
Solution Approach 2:
The patent adjusts the driving voltage parameter in response to changes in pixel driving clock frequency. This parameter change ensures that the charging rate of pixel electrodes remains stable and consistent even when the driving frequency varies to improve productivity
3Productivity
If the gate driving clock frequency is increased to improve productivity, then the charging rate may become insufficient, but increasing the driving voltage compensates for this
Solution Approach 1:
The patent implements coordinated parameter changes where both the gate driving clock frequency and driving voltage are adjusted based on the pixel driving clock frequency. When increasing frequency to improve productivity, the driving voltage is simultaneously increased to compensate and maintain sufficient charging rates
Solution Approach 2:
The system uses the determined pixel driving clock frequency as feedback to adjust the gate driving clock frequency and driving voltage. This feedback mechanism ensures that when frequency increases to improve productivity, the voltage is also adjusted to maintain adequate charging rates
Data Source
AI summary
A method of driving a display device includes receiving a reference clock signal and frequency determination data to determine a pixel driving clock frequency and generate a pixel driving clock signal, generating and outputting a gate driving clock signal according to the pixel driving clock frequency, and outputting a driving voltage according to the pixel driving clock frequency. The driving voltage increases as the pixel driving clock frequency increases.