Data Driver Voltage Control for Display Charging Rate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large-screen and high-definition display devices face challenges in securing an adequate charging rate, leading to deteriorated image quality due to difficulties in configuring sufficient power supply and voltage management.
Innovation Solution
A display device and method that utilize a data driver to reflect the difference between consecutive data signals in the output voltage, allowing for variable charging rates by incorporating a first circuit to calculate and a second circuit to apply these differences, ensuring optimal voltage levels are maintained during the horizontal time required for displaying one line of data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If display devices are made larger and higher definition, then image quality and resolution are improved, but charging rate deteriorates due to insufficient power supply configuration
Solution Approach 1:
The data driver dynamically adjusts the data voltage level based on the difference between consecutive data signals. When a difference is detected, the driver switches to a first data voltage level optimized for charging rate, and when no difference is detected, it uses a second data voltage level. This dynamic adjustment resolves the contradiction by adapting the voltage level to the actual charging needs of the display panel during different time periods within the horizontal time.
Solution Approach 2:
The invention changes the parameter of data voltage level (having at least two different levels) based on the difference value between consecutive data signals. By changing the voltage level parameter dynamically during the horizontal time, the system optimizes both charging rate and image quality for large-screen/high-definition displays without requiring increased power supply capacity.
2Productivity
If conventional data driving is used, then device simplicity is maintained, but charging rate is insufficient for large-screen displays
Solution Approach 1:
The timing controller calculates the difference value between consecutive data signals in advance and transmits this difference information to the data driver. This preliminary calculation allows the data driver to proactively adjust the data voltage level before the actual data writing occurs, optimizing the charging rate without requiring complex real-time computation in the data driver itself.
Solution Approach 2:
The timing controller acts as an intermediary that processes the consecutive data signals and generates difference value information. This intermediary component enables the data driver to operate with simpler logic by providing pre-processed difference information, thus improving charging rate without significantly increasing overall device complexity.
Data Source
AI summary
A display device can include a display panel configured to display images; and a data driver configured to receive digital data signals, determine a difference value between two consecutive data signals for data voltages to be output based on the digital data signals, change a voltage of the data voltages based on the difference value to generate a changed data voltage, and output the changed data voltage.