Sequential RGB Backlighting for Filterless LCD Color Displays
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Solution Overview
Problem
Traditional liquid crystal display (LCD) panels face issues with loss of display resolution and color distortion due to the use of subpixels and color filters, which also lead to increased costs and potential for tailing effects in fast-moving images.
Innovation Solution
The implementation of a monochromic LCD design without subpixels or color filters, utilizing a backlight with multiple colored light-emitting diodes that can be controlled to pass varying amounts of red, green, and blue light to produce millions of colors, enhancing display resolution and reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional LCD panels use subpixels and color filters to display colors, then color reproduction is achieved, but display resolution is reduced and device complexity increases
Solution Approach 1:
The patent removes subpixels and color filters from the LCD panel structure, extracting only the essential liquid crystal layer and backlight system. This extraction eliminates the complexity associated with precise subpixel alignment and color filter manufacturing while maintaining color display capability through the use of colored backlighting.
Solution Approach 2:
Instead of using a white backlight with color filters to subtract unwanted wavelengths, the patent inverts the approach by using colored backlighting directly. This inversion eliminates the need for color filters and subpixels, thereby reducing structural complexity and increasing display resolution.
2Ease of manufacture
If traditional LCD panels use subpixels and color filters, then color display is achieved, but production costs increase
Solution Approach 1:
The patent replaces expensive, precision-manufactured color filters and subpixel structures with simpler, more cost-effective colored backlighting components. This substitution reduces production costs while maintaining adequate color accuracy for display applications.
3Reliability
If traditional LCD panels use subpixels, then color reproduction is enabled, but tailing effects occur in fast-moving images
Solution Approach 1:
By removing subpixels and color filters from the display structure, the patent eliminates the sources of tailing effects that occur during rapid image transitions. The simplified liquid crystal structure responds more uniformly to changing images, improving reliability for fast-moving content.
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 significantly enhances display resolution, reduces the need for additional pixels, and minimizes color mosaic artifacts, while allowing for a broader color spectrum and more efficient color reproduction, thereby improving the overall display quality and reducing production costs.
Implementation Method 1
utilizing a backlight with multiple colored light-emitting diodes that can be controlled to pass varying amounts of red, green, and blue light
Implementation Method 2
each pixel including no further subpixels and reproducing a perceived color from one or more colored lights that are transmitted successively through a corresponding liquid crystal
Data Source
AI summary
Techniques for providing backlight techniques in liquid crystal flat panel displays are disclosed. According to embodiment, the backlighting includes three color groups of light emitting diodes that are turned on successively. Pixels in an LCD are controlled in accordance with a display signal to transmit none, all or a determined amount of one or more of the colored lights from the three color groups of light emitting diodes in a cycle, resulting in an LCD with vivid colors and minimized tailing effects.