Pixel Shift Driving for Display Devices
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Solution Overview
Problem
Display devices experience pixel deterioration due to long driving times, leading to reduced performance and visibility of image shifts to users.
Innovation Solution
A method of driving a display device that performs a first pixel shift driving without losing image information, and a second pixel shift driving with image information loss, based on changes in block grayscale values in specific areas of the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel shift technique is applied to prevent pixel deterioration, then pixel durability is improved, but user recognition of image shift increases
Solution Approach 1:
The patent changes the parameter of image information preservation by introducing a grayscale threshold criterion. When the grayscale threshold is not exceeded, the image is shifted without enlargement or reduction, preserving image information and reducing user recognition of the shift. This parameter-based control allows the system to maintain pixel durability while minimizing visible artifacts.
Solution Approach 2:
The patent applies partial pixel shift action by selectively shifting images based on grayscale threshold conditions. Instead of always shifting the image, the system performs shift only when necessary (when threshold is not exceeded), thereby reducing user recognition of image shift while still providing sufficient pixel relief to prevent deterioration.
2Loss of information
If image is shifted without enlargement or reduction, then image information is preserved, but pixel shift range is limited
Solution Approach 1:
The patent introduces a grayscale threshold parameter that controls the image shift behavior. When the grayscale threshold is not exceeded, the image is shifted without enlargement or reduction, preserving image information. This parameter-based approach allows the system to maintain image fidelity while achieving effective pixel distribution.
3Length of moving object
If image is shifted with enlargement or reduction, then pixel shift range is increased, but image information is lost
Solution Approach 1:
The patent uses the grayscale threshold as a control parameter to prevent image enlargement or reduction during pixel shift. By monitoring whether the grayscale threshold is exceeded, the system ensures that images are only shifted without scaling, thereby preserving image information while still achieving pixel deterioration prevention.
Data Source
AI summary
A display device and a method of driving the same are provided. The method of driving the display includes a display area to display an image. The method includes performing a first first pixel shift driving by shifting an image by a first range in the display area without loss of image information due to enlargement or reduction of the image, checking whether a change of a block grayscale value is greater than or equal to a threshold in an interest area in the display area, and performing second pixel shift driving by shifting an image having the loss of image information.