Dynamic Color Shadows in White Lighting via LED Modulation
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Solution Overview
Problem
Current lighting devices lack flexibility in creating dynamic and adjustable color shadows, particularly in producing white light with varying color effects that can adapt to different environments and user preferences.
Innovation Solution
A lighting device comprising multiple colored light sources arranged to produce white light, a contrast-producing element, and a control unit that modulates the spatial light spectral distribution to create dynamic color shadows, allowing for switching between static white light and dynamically changing color patterns without altering the overall spectral content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple colored light sources are arranged to produce white light, then the lighting device can provide consistent white light with high color rendering, but the device cannot create dynamic color shadows without additional control mechanisms
Solution Approach 1:
The patent applies dynamics by enabling the lighting device to switch between static white light mode and dynamic color shadow mode. The control unit modulates the intensity of individual colored light sources (red, green, blue) dynamically to create changing color shadows while maintaining stable white light output when needed, thus providing both consistency and adaptability.
Solution Approach 2:
The patent applies local quality by treating different spatial regions and functional zones differently. The contrast producing element creates regions of high and low light intensity, while the control unit independently adjusts the intensity of each colored light source to create localized color shadows without affecting the overall white light quality.
2Adaptability or versatility
If a contrast producing element is added to create color shadows, then dynamic color effects are achieved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the contrast producing element to serve multiple functions: it creates color shadows through its patterned structure, controls light distribution across different spatial regions, and works cooperatively with the control unit to enable both static and dynamic lighting modes. This multi-functionality reduces the need for separate components for each function.
Solution Approach 2:
The patent merges the contrast producing element with the light source arrangement and control unit into an integrated system. The contrast element is positioned to work in conjunction with the multiple colored light sources, and the control unit coordinates their operation, combining what could be separate functional modules into a unified device that achieves color shadow effects without proportionally increasing complexity.
3Adaptability or versatility
If the control unit modulates spatial light spectral distribution dynamically, then flexible color shadow control is achieved, but the ease of operation decreases due to multiple mode switching
Solution Approach 1:
The patent applies periodic action through the selector that switches between distinct operational modes (white light mode and color shadow mode). This periodic switching between well-defined states simplifies user interaction compared to continuous parameter adjustment, as users only need to select from predefined modes rather than control multiple parameters simultaneously.
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
Enables the production of consistent white light with high color rendering index and correlated color temperature, while dynamically changing color shadows that can be adjusted based on environmental conditions and user presence, enhancing aesthetic appeal and comfort.
Implementation Method 1
light emitting diodes (LEDs) have emerged as a strong competitor on the market for lighting applications
Implementation Method 2
light emitting LEDs with different colored light next to each other such that they together create white light
Implementation Method 3
An object blocking the light emitted by the LEDs may block light from colored light emitting diodes different amounts for each of the diodes, which results in a color shadow on an object behind the blocking object
Implementation Method 4
control unit configured to control the light source arrangement to modulate a spatial light spectral distribution of the total light emitted by the light source arrangement at the contrast producing element
Data Source
Figure 1
Figure 2a~2b
Figure 3a~4
AI summary
The present invention relates to a lighting device (100) capable of creating dynamic color shadows. The lighting device (100) comprises multiple light sources (104, 105, 106) of different colors arranged to, together as a unit, emit white light. Furthermore, a contrast producing element (110) receives the emitted light and comprises portions (114) which may block light such that a shadow can be created on an object (122) behind the contrast producing element. A control unit (116) controls the light sources to modulate a spatial light spectral distribution if a selector is in an active state, or if the control unit is in an inactive state, white light is emitted by the lighting device. Thus, the lighting device is switchable between creating dynamic color shadows on objects while emitting white light, and only emitting white light.