3D Display Crosstalk Reduction via Subpixel Brightness Adjustment
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Solution Overview
Problem
In 3D display technology, large contrast ratios between frame images cause crosstalk between the left and right eye images due to the properties of display devices, affecting the viewing effect of stereoscopic images.
Innovation Solution
An image brightness adjustment method and device that calculates the difference in brightness values of adjacent subpixels, adjusts these values if the difference exceeds a predetermined threshold, and generates display data to ensure the contrast ratio is not excessively large, thereby preventing crosstalk between the left and right eye images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time-sharing photoswitches are used to display left and right eye images alternately, then a 3D stereoscopic display effect is achieved, but crosstalk occurs between the left and right eye images due to large contrast ratios affecting the display device's turnover time
Solution Approach 1:
The patent applies preliminary action by adjusting the brightness values of subpixels before the image is displayed. The method calculates the difference between brightness values of adjacent subpixels in alternating frames and pre-adjusts them to ensure the contrast ratio remains within a manageable range, preventing crosstalk from occurring in the first place rather than correcting it after display
Solution Approach 2:
The patent implements parameter changes by modifying the brightness values of subpixels based on calculated contrast ratios. When the difference between brightness values of adjacent subpixels exceeds a threshold, the method adjusts these brightness parameters to bring the contrast ratio within acceptable limits, thereby eliminating the harmful crosstalk effect while maintaining the 3D display function
2Illumination intensity
If the contrast ratio of frame images is large, then image detail and visual impact are enhanced, but the turnover time of liquid crystal display devices is affected causing crosstalk
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting brightness values of subpixels based on the calculated contrast ratio. When the contrast ratio exceeds a predetermined threshold, the method modifies the brightness parameters of adjacent subpixels to reduce the difference, ensuring the contrast ratio remains within a range that the display device can handle without causing crosstalk
Solution Approach 2:
The patent implements feedback by calculating the contrast ratio between adjacent subpixels and using this information to determine whether adjustment is needed. The method continuously monitors the brightness difference and applies corrective adjustments only when necessary, creating a feedback loop that maintains optimal contrast ratios and prevents crosstalk while preserving image quality
Data Source
AI summary
An image brightness adjustment device, comprising an image data processing unit for extracting brightness values of subpixels arranged in a matrix manner in a frame image according to the received image data, wherein each two adjacent subpixels in a frame image form one group, a calculating unit for calculating a difference between brightness values of the two subpixels in at least part of groups and outputting a calculation result, and a comparing unit for comparing the calculation result with a predetermined value Q, a brightness adjusting unit for adjusting the brightness values of the two subpixels in the group if the calculation result is greater than the predetermined value Q, a display data generating unit for generating display data from the image data if the calculation result is smaller than or equal to the predetermined value Q, and generating display data from the adjusted image data if the calculation result is greater than the predetermined value Q.