Scan-Line Current Feedback for Display Line Artifact Correction
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Solution Overview
Problem
Display devices experience visibility issues due to bright or dark lines caused by coupling capacitance between scan lines or sensing scan lines, which affect image quality.
Innovation Solution
A display device with a current sensor to sense currents through scan and sensing scan lines, generating coupling current information to correct image data using correction coefficients based on lookup tables, thereby compensating for coupling capacitance effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coupling capacitance is formed between scan lines or sensing scan lines, then signal transmission between adjacent scan lines is affected, but visibility of bright or dark lines increases
Solution Approach 1:
The patent implements a feedback mechanism where coupling current information is sensed from scan lines and fed back to the timing controller, which then corrects image data based on the sensed coupling currents. This closed-loop feedback system dynamically compensates for the harmful effects of coupling capacitance, reducing visibility of bright or dark lines while maintaining signal transmission quality.
Solution Approach 2:
The patent changes the parameter of image data by applying correction coefficients to compensate for coupling capacitance effects. The timing controller modifies the image data parameters based on the sensed coupling currents, transforming the display output to counteract the harmful visual artifacts caused by coupling capacitance between scan lines.
2Object-affected harmful factors
If current sensing and image data correction are implemented, then visibility of bright or dark lines is reduced, but device complexity increases
Solution Approach 1:
The timing controller is designed with multi-functionality, serving both as the control unit for display operation and as the correction unit for coupling capacitance compensation. By integrating the current sensing interface and image data correction functions within the existing timing controller, the patent avoids adding separate dedicated correction hardware, thus limiting the increase in device complexity while still achieving the goal of reducing bright or dark line visibility.
3Manufacturing precision
If coupling current information is sensed and image data is corrected, then display quality is improved, but measurement and processing time increases
Solution Approach 1:
The patent performs preliminary action by sensing coupling current information during the scan line driving process itself, rather than requiring separate measurement steps. The timing controller continuously monitors coupling currents and prepares correction coefficients in advance, so that image data correction can be applied efficiently without adding significant time delay. This preliminary sensing and preparation approach maintains display quality improvement while minimizing the loss of time.
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 the visibility of bright or dark lines by correcting image data based on sensed currents, improving display quality.
Implementation Method 1
a current sensor configured to sense a current flowing through the plurality of scan lines
Implementation Method 2
visibility of a bright line or a dark line when coupling capacitance is formed between scan lines or sensing scan lines
Data Source
AI summary
A display device includes: a display panel including a plurality of pixels; a scan driver connected to the display panel through a plurality of scan lines; a data driver configured to provide a data signal corresponding to each of the plurality of pixels to the display panel; a timing controller configured to receive image data and to control driving of the scan driver and the data driver to display an image corresponding to the image data; and a current sensor configured to sense a current flowing through the plurality of scan lines, wherein the timing controller is configured to correct the image data based on the current flowing through the plurality of scan lines.