OLED Data Compensator Voltage Drop Color Difference Dithering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display quality of OLED devices degrades due to voltage drops and color differences during the dithering process, leading to potential over-compensation and image distortion.
Innovation Solution
A data compensator system that includes circuits for voltage drop and color difference compensation, which calculates and applies compensation values to input data to prevent over-compensation by dividing the display panel into regions and using weighted values and reference brightness/color coordinates to generate compensation data through dithering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dithering process is performed on input data applied to OLED device, then display quality is improved, but data conflict occurs causing display quality degradation
Solution Approach 1:
The patent segments the compensation process into two distinct circuits: a voltage drop compensator that calculates compensation values based on pixel position and electrical characteristics, and a color difference compensator that calculates compensation values based on color characteristics. This segmentation allows each circuit to handle specific aspects of display quality independently, preventing data conflicts that would occur if both compensations were performed in a single dithering process.
Solution Approach 2:
The patent applies compensation values to the input data before the dithering process. The voltage drop compensator and color difference compensator both receive the original input data and generate compensation values that are applied in advance. This preliminary action ensures that the dithering process operates on pre-compensated data without experiencing data conflicts, thereby maintaining display quality while achieving the desired compensation effects.
2Measurement precision
If voltage drop compensation is applied during dithering, then voltage drop is compensated, but color difference compensation cannot be performed separately
Solution Approach 1:
The patent divides the compensation functionality into two separate circuits: a voltage drop compensator that handles voltage drop compensation and a color difference compensator that handles color difference compensation. Each circuit is dedicated to a specific compensation task, allowing both compensations to be performed independently without interfering with each other. This segmentation resolves the contradiction by enabling both compensation types while managing complexity through functional separation.
Solution Approach 2:
Both the voltage drop compensator and color difference compensator receive the same input data and operate on the same pixel array, making the system universal in handling different compensation requirements. The compensators can be configured with different parameters (voltage drop parameters for the first compensator, color difference parameters for the second compensator) while maintaining a unified processing architecture, thus achieving multi-functionality without excessive complexity.
3Measurement precision
If multiple compensation operations are performed during dithering, then both voltage drop and color difference are compensated, but over-compensation occurs causing image distortion
Solution Approach 1:
The patent applies compensation values calculated by the voltage drop compensator and color difference compensator to the input data before dithering, rather than attempting to perform both compensations during the dithering process itself. This partial action approach ensures that compensation is applied in a controlled manner without over-compensating, thereby preventing image distortion while still achieving the desired compensation accuracy for both voltage drop and color difference.
Data Source
AI summary
A data compensator includes a voltage drop compensator configured to output a voltage drop compensation value based on input data of pixels included in a display panel, a color difference compensator configured to output a color difference compensation value to compensate for compensate the color difference of the pixels, a compensation data generator configured to generate a compensation value of the input data based on the voltage drop compensation value and the color difference compensation value, and to generate a compensation data by performing an operation on the input data and the compensation value, and a dithering block configured to generate output data by dithering the compensation data.