Frame-Comparison Backlight Control for Display Smear
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Solution Overview
Problem
The smear phenomenon in display devices occurs due to slow response speeds under high frame rate display requirements, degrading the viewing experience.
Innovation Solution
A display device and driving method that compares first and second image data to generate a comparison result, adjusting backlight brightness and/or image display signals based on this result to mitigate smear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the response speed of the display device is increased to reduce smear phenomenon, then the viewing experience is improved, but the complexity of the driving circuit increases due to the need for image data comparison and backlight brightness adjustment
Solution Approach 1:
The driving circuit compares the current frame image data with the previous frame image data before displaying, and generates a backlight brightness adjustment command in advance based on the comparison result. This preliminary action allows the display device to pre-adjust the backlight brightness to compensate for the slow response speed, thereby reducing the smear phenomenon without requiring the display panel itself to respond faster
Solution Approach 2:
The patent introduces the backlight brightness adjustment command as an intermediary mechanism between the image data and the display panel. Instead of directly increasing the response speed of the display panel, the system uses the backlight as a mediator to dynamically adjust the perceived image quality, thereby reducing smear without fundamentally changing the display panel's response characteristics
2Productivity
If the frame rate is increased to meet high frame rate display requirements, then the dynamic image quality is improved, but the smear phenomenon worsens due to the slow response speed
Solution Approach 1:
The driving circuit performs preliminary anti-action by comparing image data frames and generating backlight adjustment commands before the smear phenomenon can occur. By anticipating the need for adjustment through frame comparison, the system proactively compensates for the slow response speed that would otherwise cause smear at high frame rates
Solution Approach 2:
The patent changes the backlight brightness parameter dynamically based on the comparison between current and previous frame image data. By adjusting this parameter in response to frame rate requirements, the system maintains image quality and reduces smear phenomenon even when operating at high frame rates where the display panel's slow response would normally be problematic
Data Source
AI summary
A display device and a driving method for the display device are provided. The display device includes a driving circuit, a backlight driving unit, and a display panel. The driving circuit receives a plurality of pieces of image data. The plurality of pieces of image data include first image data and second image data. The display panel receives a plurality of image display signals of the plurality of pieces of image data. The driving circuit compares the first image data and the second image data to generate a comparison result, and provides a backlight brightness adjustment command to the backlight driving unit according to the comparison result.