Display Device Pixel Grayscale Adjustment for Power Reduction
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Solution Overview
Problem
Display devices with a pentile matrix pixel arrangement structure experience increased power consumption due to alternating voltage changes in red and blue sub-pixels, leading to inefficient energy usage.
Innovation Solution
A display device with a pixel unit comprising alternately arranged first and second pixel columns, where the timing controller adjusts grayscale values of the pixels to minimize the difference between their values, generating corrected image data to reduce power consumption by optimizing data voltage supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a pentile matrix pixel arrangement structure is used to improve image quality and resolution, then image quality is improved, but power consumption increases due to alternating voltage changes in red and blue sub-pixels
Solution Approach 1:
The patent changes the grayscale values of sub-pixels to minimize voltage alternation. Specifically, when the absolute difference between grayscale values of red and blue sub-pixels exceeds a reference value, the timing controller adjusts at least one of their grayscale values to reduce the difference, thereby reducing power consumption while maintaining image quality.
2Use of energy by moving object
If grayscale values of red and blue sub-pixels are adjusted to minimize power consumption, then power consumption is reduced, but image quality may deteriorate due to grayscale value changes
Solution Approach 1:
The timing controller continuously monitors the absolute difference between grayscale values of red and blue sub-pixels and compares it with a reference value. Based on this feedback, it dynamically adjusts grayscale values only when necessary (when the difference exceeds the reference value), thereby minimizing power consumption while maintaining image quality within acceptable limits.
Data Source
AI summary
A display device includes a pixel unit including first and second pixel columns arranged alternately along a first direction, and a third pixel column arranged between the first and the second pixel columns, a timing controller generating first or second image data by converting input image data, and a data driver generating a data voltage corresponding to the first or second image data and supplying the data voltage to the pixel unit. The first and second pixel columns each include first and second color pixels arranged alternately along a second direction, the third pixel column includes a third color pixel arranged along the second direction, and the timing controller compares a difference value between a grayscale value of the first color pixel and a grayscale value of the second color pixel with a reference value, and generates the second image data based on a comparing result.