Timing Controller Logo Edge Brightness Compensation
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Solution Overview
Problem
Existing display technologies, particularly organic light-emitting display devices, suffer from image sticking due to logo or text deterioration, which degrades image quality and shortens the device's lifespan, as current methods fail to differentiate between logo edges and backgrounds, leading to uniform brightness reduction that affects image quality.
Innovation Solution
A timing controller with a logo detecting unit, edge detecting unit, and brightness compensating unit that identifies logo regions, detects edges, and adjusts brightness only at the edges or using external region brightness to prevent image sticking, thereby maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform brightness reduction is applied to logo regions, then image sticking is prevented, but image quality deteriorates due to loss of edge definition
Solution Approach 1:
The patent divides the logo region into multiple sub-regions: a first region (edge portion) and a second region (background portion). By segmenting the logo region, the system can apply different brightness reduction strategies to different parts, preventing image sticking at edges while maintaining background visibility, thus resolving the contradiction between preventing image sticking and maintaining image quality.
Solution Approach 2:
The patent applies different brightness reduction rates to different regions within the logo area. The first region (edge) receives a first brightness reduction rate while the second region (background) receives a second brightness reduction rate. This local differentiation allows edge preservation while preventing image sticking, resolving the contradiction between reliability and manufacturing precision.
2Duration of action of stationary object
If brightness is reduced in logo regions, then organic light-emitting diode deterioration is prevented, but edge sharpness and logo definition are lost
Solution Approach 1:
The patent segments the logo region into edge portions (first region) and background portions (second region). By applying different brightness reduction rates to these segments, the system extends the service life of OLEDs by preventing deterioration while maintaining edge sharpness through selective brightness control, thus resolving the contradiction between duration of action and manufacturing precision.
Solution Approach 2:
The patent implements local quality control by assigning different brightness reduction rates to different spatial locations within the logo region. The edge portions receive controlled brightness reduction to prevent OLED deterioration, while maintaining sufficient brightness to preserve sharpness and definition, thereby resolving the contradiction between extending service life and maintaining edge sharpness.
3Reliability
If logo regions are identified and brightness adjusted, then image sticking is reduced, but processing complexity increases
Solution Approach 1:
The patent uses segmentation to divide the logo region into manageable sub-regions (edge and background portions). This segmentation simplifies the processing by providing clear boundaries and regions for different brightness reduction rates, making the overall system more manageable despite the increased functionality, thus resolving the contradiction between reliability improvement and device complexity.
Data Source
AI summary
A timing controller includes a logo detecting unit configured to compare a plurality of frames to detect a logo region, an edge detecting unit configured to detect an edge, corresponding to a boundary between the logo region and an external region of the logo region, from the logo region by using a change amount of brightness between the logo region and the external region, a brightness compensating unit configured to reduce a brightness of the logo region including the edge, and an output unit configured to output image data whose a brightness is compensated for by the brightness compensating unit.