Alternating LED Lamps for Realistic Shadow Simulation
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Solution Overview
Problem
Existing security devices fail to simulate a person's movement realistically, leading to an incomplete deterrent against break-ins.
Innovation Solution
The method involves alternating the activation of at least two lamps to create a sequence of light cones with dimming transitions, simulating a person's movement by superimposing these effects onto basic lighting, along with the use of LED lamps with adjustable beam angles and a light-shaping element to enhance shadow simulation, and incorporating noise simulation through a loudspeaker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light source with a rotating cylindrical element is used to simulate shadows, then the device structure is simple, but the simulation of person movement is not realistic
Solution Approach 1:
The invention divides the lighting system into multiple separate LED lamps (at least two) instead of using a single light source with a rotating element. Each LED lamp can be independently controlled to create light cones that move across the projection surface, simulating person movement more realistically while maintaining relatively simple device structure
Solution Approach 2:
The invention makes the lighting system dynamic by sequentially activating and deactivating multiple LED lamps in a controlled manner. The light cones created by these lamps move across the projection surface through temporal sequencing, creating a dynamic simulation of moving shadows that resembles actual person movement
2Reliability
If multiple LED lamps are activated alternately to simulate movement, then the simulation realism is improved, but the device complexity increases
Solution Approach 1:
The invention combines multiple LED lamps into a single integrated device housing with a common power supply and control system. This merging approach allows the system to achieve realistic movement simulation through multiple light sources while avoiding the complexity of multiple separate devices
Solution Approach 2:
The device is designed to perform multiple functions: it can simulate person movement by alternating LED activation, provide basic lighting when all LEDs are on, and adapt to ambient light conditions. This multi-functionality is achieved within a single device structure, reducing overall system complexity
3Speed
If the lamps are switched on or off abruptly in sequence, then the movement simulation is clear, but the transitions are not soft and realistic
Solution Approach 1:
The invention uses periodic activation and deactivation of LED lamps in a sequential pattern. Each LED is turned on and off in a rhythm that creates moving light cones across the projection surface, with the timing and duration of each activation carefully controlled to produce both clear movement patterns and smooth transitions
Solution Approach 2:
Before fully activating one LED, the system preliminarily activates adjacent LEDs in a gradual sequence. This preliminary action creates overlapping light cones that blend together, producing soft transitions between different positions and making the simulated movement appear more natural and less abrupt
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 provides a more realistic simulation of a person's presence, enhancing security by creating softer transitions and a more convincing movement pattern, while also adapting light intensity based on ambient conditions and simulating TV activity.
Implementation Method 1
at least two LEDs, in particular white LEDs (5; 5'), which are switched in sequence, preferably with a beam angle of 30° to 120°, more preferably 50° to 90°
Implementation Method 2
The sequence circuit (13) is configured in such a manner that in one setting, the at least two lamps can be switched on or switched off in sequence for creating a lamp sequence. As a result, short, i.e. not abrupt, transitions between the travelling light cones are created
Implementation Method 3
a device for simulating shadows of a person... The device comprises a multiplicity of LED lights for imitating basic lighting, which function as a projector, and projects an image or for example the casting of a shadow onto a projection surface
Data Source
AI summary
A method and a device for simulating shadows of a person moving in a building, comprising basic lighting and intended to reproduce a particularly realistic simulation of a moving person in a simple manner. This is achieved by superimposing the at least two sequentially switched lamps on the basic lighting.