Field Sequential Display Color Breakup Suppression
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Solution Overview
Problem
Field sequential image display devices face challenges in achieving high color reproduction and reliably suppressing color breakup due to differences in hue, saturation, and luminance between amplified input colors and actual displayed colors, as well as insufficient white subframe distribution ratios.
Innovation Solution
A field sequential image display device that includes an image data conversion unit generating driving image data by adjusting pixel data values across subframes using a common-color distribution ratio and adjustment coefficient, based on saturation and brightness, to maintain hue and saturation in the HSV space, while controlling light emission luminance and transmittance to optimize color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If amplification processing is performed on input image data to generate driving image data for field sequential display, then color breakup is suppressed, but differences in hue, saturation, and luminance occur between extended input color and actual display color
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the white subframe distribution ratio based on pixel characteristics (saturation, luminance, grayscale value) rather than using a fixed ratio. This allows the system to optimize both color breakup suppression and color reproduction accuracy by adapting the white subframe ratio to specific image content requirements, thereby resolving the contradiction between reliability improvement and manufacturing precision maintenance.
Solution Approach 2:
The invention introduces dynamic adjustment of the white subframe distribution ratio based on real-time analysis of input image data characteristics. By making the distribution ratio variable rather than static, the system can adapt to different image regions and content types, simultaneously achieving effective color breakup suppression and accurate color reproduction without the trade-off present in fixed-ratio approaches.
2Device complexity
If a fixed white subframe distribution ratio is used in conversion from input image data to driving image data, then device complexity is reduced, but reliable suppression of color breakup cannot be achieved for all image types
Solution Approach 1:
The patent changes the parameter of white subframe distribution ratio from a fixed value to a dynamically adjustable value based on image characteristics. This allows the system to achieve reliable color breakup suppression across various image types while maintaining reasonable computational complexity through efficient calculation methods for determining the optimal ratio.
Solution Approach 2:
The system performs self-service by automatically analyzing input image data characteristics and adjusting the white subframe distribution ratio accordingly, without requiring external intervention or complex manual configuration. This self-adjusting mechanism achieves reliable color breakup suppression while keeping the overall system complexity manageable.
Data Source
AI summary
With a field sequential method, image display having sufficiently high color reproduction is performed, and an occurrence of color breakup is more reliably suppressed. In a field sequential liquid crystal display apparatus in which a plurality of subframes including a red subframe, a green subframe, a blue subframe, and a white (common color) subframe constitutes each frame, an image data conversion unit (30) converts input image data (D1) corresponding to red, green, and blue into driving image data (D2) corresponding to the plurality of subframes, based on an adjustment coefficient (Ks) and a distribution ratio (WRs) for the white subframe, for each pixel. Two distribution ratios are selectively used as the distribution ratio (WRs). A function of obtaining a second distribution ratio (WRsv2) of the two distribution ratios is set such that the distribution ratio (WRsv2) increases as the adjusted brightness (brightness after amplification and compression processing) (V) for an input image becomes smaller.