Variable LED Blue Light Management via Segmented Control
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Solution Overview
Problem
Existing information handling systems struggle to reduce blue light energy without causing image desaturation or visually impactful changes, as manual or software-based adjustments to the white point affect all color LEDs, leading to front-of-screen degradation.
Innovation Solution
An apparatus with individually controllable LEDs, including blue, red, and green LEDs, and a processor that adjusts blue light energy based on contextual variables and ambient conditions, using separate driving inputs to maintain red and green light intensity while reducing blue light, and employing phosphor coatings or diffusers to manage blue light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If manual or software-based adjustments to the white point are made to reduce blue light energy, then blue light energy is reduced, but image quality deteriorates due to front-of-screen degradation and image desaturation
Solution Approach 1:
The patent segments the white light generation into three independent color channels (red, green, and blue LEDs) with separate driving inputs. This allows independent control of each color component, enabling selective reduction of blue light energy while maintaining red and green light intensity, thereby preserving image quality and preventing front-of-screen degradation that occurs with conventional white point adjustment methods
Solution Approach 2:
The patent applies local quality by making the blue LED's emission characteristics variable through independent current control, while keeping red and green LEDs at fixed optimal levels. This localized adjustment of blue light output allows reduction of harmful blue light energy without affecting the overall image quality, as each color channel is optimized independently for its specific function
2Object-affected harmful factors
If conventional white point adjustment methods are used to reduce blue light, then blue light exposure is reduced, but all color LEDs are affected causing front-of-screen degradation
Solution Approach 1:
The patent divides the lighting system into three independently controllable segments (red LED, green LED, blue LED) with separate driving inputs. This segmentation enables selective adjustment of only the blue LED's output while maintaining constant red and green LED operation, thereby reducing blue light exposure without causing the visual degradation and color balance issues that affect all colors in conventional white point adjustment methods
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
Effectively reduces blue light energy while maintaining image quality by independently controlling blue LEDs, minimizing visible impact on the user and ensuring maximum illumination efficiency without intermediate losses, thus preventing image desaturation.
Implementation Method 1
A light emitting diode (LED) package has first, second, and third LEDs. The first LED has a first driving input, and may emit a red color light. The second LED has a second driving input, and may emit a green color light. The third LED has a third driving input, and may emit a blue color light.
Implementation Method 2
employing phosphor coatings or diffusers to manage blue light emission
Data Source
AI summary
A first light emitting diode has a first driving input, and emits a red color light. A second light emitting diode has a second driving input, and emits a green color light. A third light emitting diode has a third driving input, and emits a blue color light. When a first current is applied to the third driving input, the third light emitting diode produces a first amount of blue light energy. When a second current is applied to the third driving input, the third light emitting diode produces a second amount of the blue light energy. The second amount of blue light energy corresponds to a percentage of blue energy reduction as compared to the amount of first blue light energy.