Display Gradation Compensation for TFT Cross-Talk Control
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Solution Overview
Problem
Display apparatuses experience cross-talk due to electromagnetic coupling among thin film transistors (TFTs), leading to pixels operating at higher or lower luminance than intended, which degrades image quality and user satisfaction.
Innovation Solution
A display apparatus with a memory storing cross-talk weights for each gradation of adjacent pixels and a processor that obtains gradation values, histogram information, and corrects gradation values based on identified cross-talk amounts to compensate for electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electromagnetic coupling among TFTs is utilized for display operation, then display functionality is achieved, but cross-talk is generated causing image quality degradation
Solution Approach 1:
The patent measures the actual cross-talk influence on each pixel and uses this information to calculate compensation values. By converting the harmful electromagnetic coupling effect into measurable data, the system can then apply opposite corrections to achieve accurate luminance output, effectively transforming the harmful cross-talk into a controllable parameter for image quality improvement
Solution Approach 2:
The patent dynamically adjusts the drive signal parameters (gradation values) for each pixel based on measured cross-talk characteristics. By changing the drive signal parameters in real-time to compensate for electromagnetic coupling effects, the system maintains accurate luminance control despite the presence of cross-talk, thus resolving the contradiction between display functionality and image quality
2Manufacturing precision
If cross-talk compensation is implemented, then image quality is improved, but processing complexity increases
Solution Approach 1:
The patent performs preliminary measurement of cross-talk influence for each pixel before actual image display. By pre-characterizing the electromagnetic coupling effects and storing compensation data, the system reduces real-time processing complexity during actual operation, as the compensation values can be applied directly without repeated complex calculations
Solution Approach 2:
The patent introduces an intermediate compensation calculation stage that processes measured luminance values and cross-talk weights to generate corrected drive signals. This intermediary processing layer separates the complex measurement and compensation logic from the main display control, making the system more manageable and enabling modular optimization of the compensation algorithm
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 effectively reduces cross-talk by adjusting gradation values, ensuring pixels operate at intended luminance levels, thereby improving image quality and user satisfaction.
Implementation Method 1
electromagnetic coupling that was not intended may be generated in the designing process of the display apparatus among the plurality of TFTs
Implementation Method 2
A display apparatus may include a plurality of thin film transistors (TFTs) on a display panel
Data Source
AI summary
A display apparatus includes a display including a plurality of pixels; a memory storing a cross-talk weight for each gradation of adjacent pixels corresponding to a gradation value of a target pixel; and at least one processor configured to: obtain a gradation value of each pixel included in at least one line of pixels among the plurality of pixels, obtain histogram information indicating a number of pixels corresponding to each gradation section based on the obtained gradation value of each pixel in the at least one line of pixels, identify an amount of cross-talk corresponding to a target pixel based on the histogram information and the cross-talk weight for each gradation of adjacent pixels corresponding to a gradation value of the target pixel, and obtain a gradation correction value of the target pixel based on the identified amount of cross-talk.