OLED Driver Circuit Dynamic Detection Time Compensation
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Solution Overview
Problem
OLED display panels exhibit uneven displays due to aging of organic light emitting diodes, leading to changes in light emitting brightness and reduced detection precision over time.
Innovation Solution
A driver circuit with detection capacitors, a drive module, and a compensation module that acquires voltage values after discharge through sub-pixel units within a detection time duration, determining a compensation gain value to adjust drive signals and maintain optimal detection ranges, thereby compensating for aging and improving display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed detection time duration is used, then the detection process is simple, but the voltage values deviate from optimal detection range as OLED ages, reducing detection precision
Solution Approach 1:
The detection time duration is made dynamic by adjusting it according to the service time duration of the display panel. As the OLED ages, the detection time duration is extended to compensate for reduced discharge capacity, ensuring voltage values remain within the optimal detection range of the drive module throughout the product lifecycle.
Solution Approach 2:
The detection time duration parameter is changed based on the service time duration of the display panel. By extending the detection time duration as the OLED ages, the system compensates for aging effects and maintains detection precision without requiring complex additional hardware.
2Measurement precision
If detection time duration is extended to compensate for OLED aging, then voltage values remain in optimal detection range, but detection process takes longer
Solution Approach 1:
The detection time duration parameter is dynamically adjusted based on the service time duration of the display panel. This allows the system to extend detection time only when necessary (as OLED ages) rather than using a constantly extended time duration, optimizing the balance between precision and speed.
3Productivity
If detection time duration is shortened for faster detection, then detection speed increases, but voltage values fall outside optimal detection range for aged OLEDs
Solution Approach 1:
The detection time duration is dynamically adjusted based on the service time duration of the display panel. Newly manufactured panels use shorter detection times for fast detection, while aged panels automatically receive extended detection times to maintain precision, optimizing both speed and accuracy at different lifecycle stages.
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 that voltage values remain within optimal detection ranges, enhancing detection and compensation precision, thus improving the uniformity and longevity of OLED display panels by dynamically adjusting detection time based on service time duration.
Implementation Method 1
a voltage of each of the plurality of detection capacitors after being discharged through a sub-pixel unit corresponding to each of the plurality of detection capacitors within a detection time duration is acquired
Implementation Method 2
An organic light emitting diode (OLED) display panel has advantages of self-illumination, low drive voltage, high luminous efficiency
Data Source
AI summary
A driver circuit of a display panel, a display panel, and a driving method of the display panel. The display panel includes a plurality of sub-pixel units, and the driver circuit includes a plurality of detection capacitors, a detection capacitor and a compensation module; a first end of each of the plurality of detection capacitors is electrically connected to the plurality of sub-pixel units, and a second end of each of the plurality of detection capacitors is grounded; a first end of the drive module is electrically connected to the first end of each of the plurality of detection capacitors; and a second end of the drive module is electrically connected to the compensation module.