Image Display Device Using Resolution Conversion for Expanded Color Range
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Solution Overview
Problem
Image display devices using four sub-pixels face challenges such as limited color range, design changes, and increased costs, as they require converting three sub-pixel dots into four, which is not feasible in fixed-position liquid crystal devices.
Innovation Solution
An image display device that uses M (M > 3) adjacent sub-pixels with a 3:4 length ratio, employing a resolution converter, color separating unit, and driving circuit to convert and separate image data, allowing for M-color dot display without losing color information, and optionally determining achromatic data to convert 4-dot to 3-dot patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If one dot is displayed using four sub-pixels, then the displayable color range is enlarged, but design changes and increased cost occur
Solution Approach 1:
Instead of changing the sub-pixel arrangement to achieve four-sub-pixel display, the patent inverts the approach by maintaining the conventional three-sub-pixel arrangement and using resolution conversion to achieve the same effect. This avoids design changes while still enabling expanded color display capability
Solution Approach 2:
The patent uses resolution conversion to create a virtual four-sub-pixel display effect from a three-sub-pixel physical arrangement. By converting image data resolution and interpolating colors, it creates a copied representation of four-sub-pixel functionality without physically reconfiguring the sub-pixels
2Adaptability or versatility
If one dot is displayed using four sub-pixels, then the displayable color range is enlarged, but cost increases due to design change
Solution Approach 1:
The patent inverts the conventional approach by not changing the physical sub-pixel arrangement but achieving four-sub-pixel functionality through resolution conversion and color interpolation in the image processing stage, thereby avoiding manufacturing cost increases
Solution Approach 2:
The patent replaces the mechanical/physical approach of physically arranging four sub-pixels with an electronic/software-based resolution conversion and color interpolation system, eliminating the need for costly design changes and manufacturing process modifications
3Loss of information
If resolution is converted to display M dots as 3 dots, then color information is preserved, but edge or boundary may be lost
Solution Approach 1:
The patent applies different processing strategies to different regions of the image data. Achromatic regions (edges and boundaries) are handled with special conversion rules to preserve sharpness, while chromatic regions use full color interpolation to preserve color information. This local differentiation resolves the contradiction between preserving color and maintaining edge quality
Data Source
AI summary
An image display device in which one dot is displayed using M (M is an integer larger than 3) sub-pixels having different colors and being disposed adjacent to each other in a vertical direction or horizontal direction, a ratio of a length of the sub-pixel of the one dot in a disposition direction to a length, in a direction orthogonal to the disposition direction being M:3, includes a resolution converter that converts the resolution in the disposition direction of the image data which defines an image to be displayed for every dot to 3/M; a color separating unit that separates the image data converted by the resolution converter into color components corresponding to the M sub-pixels for every dot; and a driving circuit that drives the sub-pixels so as to have a resolution defined by the image data separated by the color separating unit.