Sequential Color Display Reducing Power and Color Breakup
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Solution Overview
Problem
Traditional LCD displays face challenges in achieving high refresh rates without excessive power consumption and color breakup, especially at lower frame rates, which affects display quality and power efficiency.
Innovation Solution
The implementation of a mixed sequential color display using a light source that generates different colors in a timed sequence and a display panel with sub-pixel combinations, including clear and colored sub-pixels, to enhance luminescence and reduce color breakup, while optimizing power consumption and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If field sequential color displays operate at high frame rates (350 Hz) to avoid color breakup, then display quality is improved, but power consumption increases significantly
Solution Approach 1:
The patent applies periodic action by using a light source that sequentially generates different colors of light in a timed sequence (e.g., red, green, blue LEDs activating in sequence). This temporal color generation allows the display to achieve high-quality color rendering without requiring continuously high frame rates, thereby reducing power consumption while maintaining display quality
Solution Approach 2:
The patent changes the parameter of color generation from spatial (simultaneous RGB subpixels) to temporal (sequential color cycling). By varying the timing and sequence of color light generation, the system achieves full-color display with lower power consumption at reduced frame rates (e.g., 60 Hz or 120 Hz) while avoiding color breakup through careful timing control
2Use of energy by moving object
If LCD displays refresh at traditional 60 Hz, then power consumption is reduced, but response time is insufficient to operate at high refresh rates and color breakup occurs
Solution Approach 1:
The patent replaces the traditional mechanical LCD gating structure with a light source-based color generation system. Instead of using liquid crystal molecules that physically rotate to control light passage (which has inherent response time limitations), the system uses LEDs that can switch colors instantaneously, eliminating the response time bottleneck and enabling high refresh rates with low power consumption
3Manufacturing precision
If DLP projection displays use a moving color wheel at 540 Hz, then color breakup is avoided, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the mechanical color wheel component from the DLP projection system. Instead of using a physically rotating color wheel that requires high-speed operation, the system uses a stationary array of RGB LEDs that can be electronically controlled to emit colors in sequence, achieving the same color breakup avoidance without the mechanical complexity
Solution Approach 2:
The patent replaces the mechanical color wheel rotation with an electronic control system that sequentially activates different colored LEDs. This substitution eliminates moving parts, reduces device complexity, and enables precise timing control for color generation without the mechanical inertia and wear associated with rotating components
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 improves display quality by reducing color breakup and power consumption, allowing for efficient operation at lower frame rates with enhanced luminescence and chrominance, making it suitable for both conventional and transparent displays.
Implementation Method 1
The light source can be implemented as different color LEDs that sequentially generate the different colors of light in a timed sequence
Implementation Method 2
The pixel combination and the light source together may be implemented to enhance the luminescence of the emitted color over the chrominescence of the emitted color
Data Source
AI summary
In embodiments of mixed sequential color display, a light source sequentially generates different colors of light in a timed sequence. A display panel is implemented with multiple sub-pixel combinations, where each pixel of the display panel is a combination of sub-pixels that emit a color based on a color of the light that illuminates a sub-pixel combination. The emitted color from a sub-pixel combination is generated as a product of the color of the light and a combination of sub-pixel colors (to include clear and/or colored sub-pixels). The clear and/or different colored sub-pixels in a sub-pixel combination are a spatial aspect of the emitted color, and the sequentially generated different colors of light are a temporal aspect of the emitted color. The pixel combination and the light source together enhance the luminescence of the emitted color over the chrominescence of the emitted color.