Display Device Pre-Charging Gate and Data Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in enhancing the charging rate of pixels, particularly when increasing resolution and driving frequency, leading to reduced charging time and rate due to shorter gate on time for switching elements.
Innovation Solution
The implementation of a display device with a timing controller, gate driver, and data driver that simultaneously and sequentially supply gate signals and data signals to pixels, using pre-charging gray scale values calculated based on pixel gray scale values to optimize charging, allowing for enhanced charging rates by adjusting gate on times and data voltage application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the resolution and driving frequency of the display device are increased, then the display quality and response speed are improved, but the gate on time for switching elements is reduced, leading to reduced charging time and charging rate of pixels
Solution Approach 1:
The patent applies preliminary action by introducing a pre-charging period before the normal charging period. During the pre-charging period, a pre-charging voltage is applied to the pixel to partially charge the storage capacitor in advance. This preliminary charging action allows the pixel to reach the desired voltage level faster during the subsequent normal charging period, effectively increasing the charging rate without extending the total gate on time.
Solution Approach 2:
The patent segments the charging process into two distinct periods: a pre-charging period and a normal charging period. The pre-charging period is used to rapidly charge the pixel to a preliminary voltage level, while the normal charging period completes the charging to the final desired voltage. This segmentation allows optimization of each period's duration and voltage level independently, solving the contradiction between limited gate on time and insufficient charging rate.
2Manufacturing precision
If the resolution of the display device is increased, then the display detail and image quality are improved, but the charging time of data voltage to pixels is reduced
Solution Approach 1:
The pre-charging period performs preliminary action by charging the pixel storage capacitor to a preliminary voltage level before the normal charging period begins. This advance charging action compensates for the reduced charging time available at high resolutions, ensuring that pixels have sufficient time to reach their final voltage levels even when the gate on time is constrained by high display resolution requirements.
Solution Approach 2:
The patent changes the voltage parameter during different periods: a pre-charging voltage is applied during the pre-charging period, and a different data voltage is applied during the normal charging period. This parameter change allows the system to optimize charging efficiency at high resolutions by using higher pre-charging voltages to rapidly establish preliminary charge, then using controlled data voltages to achieve precise final voltage levels despite limited total charging time.
Data Source
AI summary
A display device includes a display panel including gate lines, data lines, and pixels; a gate driver that provides gate signals to the pixels through the gate lines; a data driver that provides data signals to the pixels through the data lines; and a timing controller that obtains pre-charging gray scale values based on gray scale values of the pixels. The gate driver simultaneously supplies the gate signals to the gate lines in a first period, and sequentially supplies the gate signals to the gate lines in a second period. The data driver supplies data signals corresponding to the pre-charging gray scale values to the data lines in the first period, and supplies data signals corresponding to the gray scale values of the pixels to the data lines in the second period.