Stretchable Panel Driving Circuit for Luminance Compensation
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Solution Overview
Problem
Stretchable displays face challenges in maintaining image quality and compensating for luminance unevenness as they are stretched, particularly due to changes in light emitting areas and spaces between them.
Innovation Solution
A stretchable display device and panel driving circuit that includes a stretch detection circuit with delay cells and stretch variable capacitors to detect panel stretching, generating compensation control signals to maintain image quality and compensate for luminance unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is stretched to enable flexible form factors, then the adaptability and flexibility of the display device is improved, but the image quality and luminance uniformity deteriorate due to increased light emitting areas and spacing changes
Solution Approach 1:
The stretch detection circuit detects the degree of stretch before it affects display performance, and the compensation driving circuit pre-adjusts the data signals accordingly. This preliminary detection and adjustment prevents image quality degradation before it occurs, resolving the contradiction between stretchability and image quality maintenance.
Solution Approach 2:
The stretch detection circuit provides real-time feedback on the stretch degree to the compensation driving circuit, which then adjusts the data signals dynamically. This feedback mechanism enables continuous compensation for luminance unevenness caused by stretching, maintaining image quality while allowing the display to be stretched.
2Measurement precision
If stretch detection circuits are disposed in the display area to directly monitor stretch, then the measurement precision of stretch degree is improved, but the device complexity and risk of additional failures increase
Solution Approach 1:
The patent uses existing signal lines (data lines or gate lines) as intermediaries to transmit stretch information indirectly. Instead of placing detection circuits directly in the display area, the system uses the timing differences of signals already present in the display structure to infer stretch degree, eliminating the need for additional detection circuits while maintaining measurement capability.
Solution Approach 2:
The existing data lines and gate lines serve dual functions: they transmit display signals and simultaneously carry stretch detection information through timing differences. This multi-functionality eliminates the need for separate stretch detection circuits, reducing device complexity while maintaining stretch monitoring capability.
3Manufacturing precision
If compensation for brightness is applied to maintain luminance uniformity, then the image quality is improved, but the device complexity increases due to additional control circuits and signal processing
Solution Approach 1:
The compensation driving circuit merges the stretch detection function with the existing data driving function. By combining the stretch compensation adjustment with the normal data signal output, the system achieves luminance uniformity compensation without adding separate compensation hardware, thus reducing overall device complexity.
Solution Approach 2:
The system compensates for luminance unevenness by dynamically changing the parameter of data signal timing based on the detected stretch degree. Instead of adding complex hardware, the invention adjusts the timing parameters of existing signal lines to achieve compensation, simplifying the control circuit architecture.
Data Source
AI summary
The present disclosure provides to a stretchable display device and a stretchable panel driving circuit, the display device including a stretchable display panel, a gate driving circuit configured to supply gate signals to pixels through gate lines, a data driving circuit, at least one stretch detection circuit group including at least one delay cell and at least one stretch variable capacitor disposed in a non-display area of the display panel, and configured to detect a delay time caused by stretch, a compensation control signal generator configured to generate a compensation control signal based on the delay time, and a timing controller configured to output a compensated signal based on the compensation control signal.