Signal Processing for Hold Blur Reduction in Self-Luminous Displays
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Solution Overview
Problem
Current technologies lack an effective method to improve hold blur in self-luminous display devices like OLEDs, which is a common issue due to human visual characteristics and affects the display quality of moving images.
Innovation Solution
A signal processing device that analyzes video signals to detect indices related to hold blur, calculates a light emission duty value for the display panel, and adjusts a gain for luminance compensation to reduce hold blur, incorporating features like motion detection, saturation level analysis, and average pixel level control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the light emission duty is reduced to improve hold blur, then hold blur is reduced, but luminance decreases
Solution Approach 1:
The patent dynamically changes the light emission duty parameter based on detected motion amounts and detail levels. When motion is detected or detail level is high, the light emission duty is reduced to improve hold blur. The luminance compensation gain is simultaneously adjusted to maintain perceived brightness, resolving the contradiction between reducing hold blur and maintaining luminance.
Solution Approach 2:
The system uses feedback from motion detection and detail level analysis to continuously adjust the light emission duty and luminance compensation gain. This closed-loop control ensures that hold blur is minimized while luminance is maintained through real-time parameter adjustment based on content characteristics.
2Object-affected harmful factors
If the light emission duty is reduced to improve hold blur, then hold blur is reduced, but stress on OLED elements increases
Solution Approach 1:
The patent implements dynamic adjustment of light emission duty based on content characteristics rather than using a fixed low duty cycle. By adapting the duty cycle to actual motion and detail requirements, the system minimizes hold blur only when necessary, thereby reducing unnecessary stress on OLED elements while maintaining image quality.
3Illumination intensity
If luminance compensation gain is increased to maintain luminance, then luminance is maintained, but noise is amplified
Solution Approach 1:
The patent applies luminance compensation gain locally based on detected regions of interest. Instead of uniformly increasing gain across the entire image, the system selectively applies higher gain only to areas with low motion and low detail level where hold blur is less critical, thereby maintaining luminance in critical areas without amplifying noise throughout the entire image.
Data Source
AI summary
The present technology relates to a signal processing device, a signal processing method, and a display device for enabling more appropriate improvement of hold blur. There is provided a signal processing device including a detection unit that analyzes a video signal of content and detects an index that correlates with hold blur, a first calculation unit that calculates a light emission duty value of a self-luminous display panel on the basis of the detected index, and a second calculation unit that calculates a gain for luminance compensation on the basis of the calculated light emission duty value. The present technology can be applied to, for example, a self-luminous display device.