De-saturated Colour Injection for Color Sequential Displays
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Solution Overview
Problem
Colour sequential displays suffer from motion-blur and colour fringe artifacts due to the separation of monochrome images on the retina when the viewer's eye moves, especially at interfaces between different colours and dark areas, leading to unwanted colour fringes.
Innovation Solution
Incorporating de-saturated monochrome colour images before and after active sequences of saturated colours in a colour sequential image system, with the duration of these de-saturated images adjusted to match and be temporally close to the adjacent active images, reducing fringe artifacts and brightness loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If monochrome images are used in rapid sequence to form full-colour image, then size, weight, cost and alignment precision are improved, but colour fringe artifacts and motion-blur occur when viewer's eye moves
Solution Approach 1:
De-saturated monochrome images are injected before and after the active sequence of saturated colour images. This preliminary and follow-up action prepares the viewer's visual system in advance and maintains it afterward, preventing the separation of monochrome images on the retina that causes colour fringe artifacts and motion-blur.
Solution Approach 2:
De-saturated monochrome images act as intermediary elements between the saturated colour images. These intermediary images with reduced saturation serve as transition frames that prevent abrupt changes in colour intensity, thereby reducing the harmful effects of retinal image separation and colour fringe artifacts.
2Object-affected harmful factors
If de-saturated monochrome colour images are injected before and after active sequence, then colour fringe artifacts are reduced, but brightness loss may occur
Solution Approach 1:
The saturation parameter of the monochrome images is changed by using de-saturated images with reduced colour intensity. This parameter change allows the images to serve their protective function against colour fringe artifacts while minimizing the impact on overall brightness and reducing energy loss.
3Object-affected harmful factors
If duration of injected de-saturated images is increased, then fringe artifacts are reduced, but saturated colour brightness loss increases
Solution Approach 1:
Instead of using full-duration saturated images, the patent applies partial action by injecting de-saturated images for a controlled duration before and after the active sequence. This partial use of de-saturated images is sufficient to reduce fringe artifacts while minimizing the loss of saturated colour brightness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively minimizes colour fringe artifacts and brightness loss by strategically injecting de-saturated colours, improving the visual clarity of moving objects in colour sequential displays.
Implementation Method 1
These displays use a rapid sequence of monochrome images and rely on the time-integration properties of the human eye to yield a full-colour image for each frame of the video image
Implementation Method 2
the image sequence consists of one or more repetitions of three primary colours (red, green, blue)
Data Source
AI summary
De-saturated color injected sequences in a color sequential image system are provided. The system comprises: at least one spatial light modulator; a light system configured to produce a series of colors illuminating the modulator, the series comprising: saturated colors; and, de-saturated colors which respectively replace one or more of the saturated colors on either side of a center of the series of colors; and, an image processor configured to control the modulator to inject one or more of the de-saturated colors both prior to and following an active sequence of the saturated colors in at least a portion of pixels within a video frame, respective locations of the de-saturated colors selected to minimize respective times between at least one first de-saturated color prior to a first saturated color in the active sequence and between at least one second de-saturated color following a last saturated color in the active sequence.