RGBW Display White Subpixel Control for Power and Resolution
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Solution Overview
Problem
Display devices using RGBW sub-pixels face a trade-off between power consumption and visual resolution, with existing methods either increasing power consumption or compromising image quality, especially when viewed from varying distances due to inconsistent use of the white sub-pixel.
Innovation Solution
Incorporating a human detection sensor to adjust the use rate of the white sub-pixel based on the viewer's distance, dynamically changing the value of M in equations to optimize power savings while maintaining high visual quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the use rate of the W sub-pixel is increased to reduce power consumption, then power consumption is reduced, but visual resolution deteriorates
Solution Approach 1:
The patent applies dynamics by making the use rate of the W sub-pixel variable rather than fixed. The control unit dynamically adjusts the use rate based on detected viewing distance: using a higher use rate (e.g., 100%) when the viewer is far away to save power, and a lower use rate (e.g., 50% or less) when the viewer is close to maintain visual resolution. This dynamic adjustment resolves the contradiction between power consumption and visual resolution.
Solution Approach 2:
The patent changes the parameter of W sub-pixel use rate based on viewing distance conditions. When the detected distance exceeds a threshold, the system switches to a power-saving mode with higher W sub-pixel usage; when the distance is within the threshold, it switches to a quality-mode with lower W sub-pixel usage. This parameter change strategy allows the system to optimize between power consumption and visual resolution according to actual viewing conditions.
2Manufacturing precision
If the use rate of the W sub-pixel is decreased to improve visual resolution, then visual resolution is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the W sub-pixel use rate based on real-time distance detection. When a viewer is detected within the threshold distance, the control unit automatically reduces the W sub-pixel use rate to improve visual resolution, accepting the trade-off of increased power consumption only when necessary for quality. When the viewer moves away, the system returns to high W sub-pixel usage for power saving.
Solution Approach 2:
The patent implements parameter changes by switching the W sub-pixel use rate based on viewing distance thresholds. The system monitors distance continuously and adjusts the use rate parameter accordingly: maintaining lower use rate (e.g., 50% or less) when distance is within threshold to ensure visual resolution, and increasing to higher use rate (e.g., 100%) when distance exceeds threshold to reduce power consumption.
3Device complexity
If a fixed use rate of the W sub-pixel is used, then device complexity is reduced, but adaptability to different viewing conditions deteriorates
Solution Approach 1:
The patent applies universality by making the display system capable of multiple operating modes through a single adjustable parameter (W sub-pixel use rate). The same display hardware can adapt to different viewing distances by changing the use rate, providing both power-saving mode and quality-mode functions without requiring additional hardware components. This multi-functionality resolves the contradiction between device complexity and adaptability.
Solution Approach 2:
The system implements feedback by using a detection unit to monitor viewing distance and feed this information back to the control unit, which then adjusts the W sub-pixel use rate accordingly. This closed-loop feedback mechanism allows the display to automatically adapt to different viewing conditions without user intervention, achieving high adaptability while maintaining relatively simple device architecture through intelligent control.
Data Source
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AI summary
In order to maintain a high visual image quality and save power, a display device includes : R sub-pixels, G sub-pixels, B sub-pixels, and W sub-pixels; and a human detection sensor (12) for detecting whether or not a person is present within a predetermined range. A use rate of the W sub-pixels is changed depending on whether or not a person is present within the predetermined range.