Display Driving Controller Voltage Compensation
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Solution Overview
Problem
Display devices face challenges in maintaining image quality due to voltage differences between test-dedicated and actual driving voltages, leading to sensing and optical compensation errors that affect the display panel's characteristics.
Innovation Solution
A display device with a driving controller that generates error correction values for sensing and optical compensation, using a voltage generator to adjust driving voltages and convert input image signals based on pre-stored voltage levels, ensuring compatibility with the display panel's characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If voltage generator uses actual driving voltage different from test-dedicated voltage, then manufacturing time is reduced, but sensing compensation and optical compensation errors occur
Solution Approach 1:
The system changes the voltage parameter dynamically by detecting the actual driving voltage level and adjusting compensation values accordingly. The control unit detects whether the actual driving voltage matches the test-dedicated voltage and applies appropriate compensation strategies based on the voltage parameter difference.
Solution Approach 2:
The control unit continuously monitors the actual driving voltage from the voltage generator and uses this feedback information to determine the appropriate compensation approach. Based on the detected voltage level, the system selectively applies sensing compensation, optical compensation, or both, ensuring accurate compensation adapts to the actual operating conditions.
2Reliability
If error correction is applied for both sensing and optical compensation, then image quality is improved, but device complexity increases
Solution Approach 1:
The compensation system operates dynamically by detecting the actual driving voltage and adaptively selecting the appropriate compensation mode. The control unit adjusts the compensation strategy in real-time based on voltage conditions, enabling the system to switch between different compensation approaches without requiring complex fixed architecture.
Solution Approach 2:
The compensation mechanism is segmented into distinct functional blocks: a control unit for voltage detection and decision-making, a sensing compensation unit for voltage difference correction, and an optical compensation unit for color characteristic correction. This segmentation allows each unit to perform its specific function independently while working together to achieve overall image quality improvement.
Data Source
AI summary
A display device includes: a display panel, which includes a pixel; a voltage generator, which generates a driving voltage for an operation of the display panel; and a driving controller, which receives an input image signal and outputs an output image signal obtained by compensating for the input image signal based on a characteristic of the display panel. The driving controller includes: a control unit, which outputs an error correction value corresponding to a voltage difference between a voltage level of the driving voltage provided from the voltage generator and a voltage level stored in advance in the control unit when the driving voltage is provided from the voltage generator; and an image correction unit. which converts the input image signal into the output image signal based on the error correction value.