Display Panel Distribution Voltage Adjustment for Image Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in maintaining high picture quality across different image types without the need for costly aging processes, as fixed distribution voltages fail to prevent vertical line faults in moving pictures and afterimages in still images.
Innovation Solution
A display device with a power supply that adjusts the distribution voltage based on image type, determined by comparing consecutive frame data, using a timing controller and power supply system with resistors and switching elements to output appropriate voltages for moving or still images, optimizing picture quality without aging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed distribution voltage is applied to the display panel, then the device structure is simple and manufacturing is easy, but picture quality deteriorates for specific image types (vertical line faults in moving pictures and afterimages in still images)
Solution Approach 1:
The power supply structure is made dynamic by introducing a timing controller that adjusts the distribution voltage based on image type detection. The controller compares consecutive frame data to determine whether the image is moving or still, then dynamically selects appropriate voltage levels to prevent display defects while maintaining structural feasibility
Solution Approach 2:
The distribution voltage parameter is changed based on image type. For moving pictures, a first distribution voltage is applied to prevent vertical line faults, while for still pictures, a second distribution voltage is applied to prevent afterimages. This parameter adaptation resolves the contradiction between simple fixed-voltage structure and high picture quality
2Reliability
If an aging process is implemented to improve picture quality, then display performance is enhanced, but productivity decreases due to additional processing time
Solution Approach 1:
Instead of performing aging treatment as a preliminary manufacturing step, the invention takes preliminary action by embedding image type detection and dynamic voltage adjustment functionality in the driving system. This allows the display to adapt to different image types in real-time without requiring time-consuming pre-aging processes, thereby maintaining high picture quality while preserving manufacturing productivity
3Reliability
If the distribution voltage is adjusted based on image type, then picture quality is improved for both moving and still images, but the power supply system complexity increases
Solution Approach 1:
The timing controller is designed with multi-functionality, serving both as a general control unit and as an image type detector. By comparing consecutive frame data, it universally handles different image types (moving and still pictures) and automatically adjusts the distribution voltage accordingly. This universal approach improves picture quality across all image types without requiring separate dedicated circuits for each function
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
The solution ensures high picture quality for both moving and still images without the need for pre-aging processes, improving productivity by dynamically adjusting the distribution voltage to prevent vertical line faults and afterimages.
Implementation Method 1
the power supply may include first and second resistors serially connected between first and second power sources and a third resistor and a switching element serially connected between a first node between the first and second resistors and the second power source
Data Source
AI summary
A display device includes a display panel including a plurality of pixels, a power supply which supplies a common voltage and a distribution voltage to the display panel, and a timing controller which outputs a selection signal corresponding to image data input from the outside where the power supply supplies the distribution voltage having a value corresponding to the selection signal to the display panel.