Display Light Source Blinking Control for Motion Blur Reduction
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Solution Overview
Problem
Display devices often struggle to display high frame rate video content due to hardware constraints, leading to issues like shutter angle phenomenon and motion blur, where frames need to be discarded or heavily processed to reduce strobing, resulting in a jerky or blurred visual experience.
Innovation Solution
Implementing a blinking function for the light source of the display, where the blinking frequency is determined based on the original frame rate of the video content, either from metadata or user input, to increase the apparent frame rate and reduce motion blur, by controlling the backlight or light source to blink at specific frequencies, such as 120 Hz for 120 Hz content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If display devices operate at higher frame rates to avoid cross-talk between sequential images, then visual quality improves, but hardware constraints prevent most devices from achieving sufficiently fast update rates
Solution Approach 1:
The patent applies periodic action by implementing a blinking function for the light source that operates at a determined blinking frequency. The light source is controlled to periodically turn on and off during video content presentation, with the blinking frequency set based on the original frame rate of the video content (e.g., 120 Hz for 120 Hz content). This periodic blinking creates multiple visible frames from a single displayed image, effectively raising the apparent frame rate without requiring the display hardware to physically update at higher rates, thus resolving the contradiction between visual quality and hardware constraints
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the blinking frequency parameter of the light source based on the frame rate parameter of the video content. The processing circuitry determines the appropriate blinking frequency from metadata or user input and configures the light source accordingly. This parameter adjustment allows the system to adapt to different video frame rates (e.g., 60 Hz, 120 Hz, 240 Hz) without changing the underlying display hardware capabilities, effectively resolving the mismatch between content requirements and device limitations
2Device complexity
If frames are discarded or heavily processed to reduce strobing on devices with limited frame rate capability, then hardware constraints are accommodated, but motion blur and jerky visual experience worsen
Solution Approach 1:
Instead of discarding frames or applying heavy processing that degrades visual quality, the patent uses periodic blinking of the light source to create the perception of higher frame rates. The blinking function generates multiple visible frames from each displayed image by controlling the light source to turn on and off at specific frequencies. This approach maintains all original video frames while creating the illusion of smoother motion, thereby improving visual experience without requiring frame discarding or aggressive processing
Solution Approach 2:
The patent introduces an intermediary element - the blinking light source - that mediates between the display hardware and the video content. Rather than modifying the video frames or directly upgrading the display panel, the blinking function acts as an intermediary that transforms the output of standard-rate displays into high frame rate presentations. This intermediary approach allows compatible hardware to deliver high-quality visual experiences without requiring hardware modifications or frame processing that would degrade image quality
Data Source
AI summary
A method for controlling a light source of a display is provided. In the method, maximum frame rates are determined for different portions of video content to be displayed on the display. The light source of the display is controlled to blink according to a blinking frequency when a first portion of the video content having a first maximum frame rate is displayed. First metadata of high dynamic range is received. The light source of the display is controlled to not blink when a second portion of the video content having a second maximum frame rate is displayed. The video content is displayed at the maximum frame rates and in the high dynamic range.