Hospital Light System Simulating Daylight for Patient Orientation
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Solution Overview
Problem
Inadequate illumination in hospital rooms, particularly intensive care units, leads to patient confusion and delirium due to the lack of natural light, disrupting temporal and spatial orientation.
Innovation Solution
A light system with controlled intensity, direction, and color simulation mimicking natural daylight conditions, using multiple light sources and a controller to replicate dawn, dusk, and midday light, along with visual elements like clouds and moving animals, to create a realistic outdoor environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple light sources and video displays are used to simulate natural daylight conditions, then patient temporal and spatial orientation is improved, but device complexity increases
Solution Approach 1:
The lighting system is divided into multiple independent light sources (first light source, second light source, third light source) that can be controlled separately to simulate different aspects of natural daylight (direction, intensity, color temperature) throughout the day, thereby improving patient orientation while managing complexity through modular design
Solution Approach 2:
A controller is introduced as an intermediary device that coordinates the operation of multiple light sources and video displays according to predetermined schedules, simulating natural daylight patterns without requiring complex manual coordination of each component
2Reliability
If light intensity control device is operated according to daylight model, then delirium risk is reduced, but energy consumption increases
Solution Approach 1:
The light intensity control device operates according to a predetermined daylight model that varies light intensity periodically throughout the day, mimicking natural circadian rhythms to reduce delirium risk while consuming energy only when and where needed, rather than continuous high-intensity illumination
Solution Approach 2:
Different light sources are positioned to illuminate specific areas (head of bed, foot of bed, window area) with appropriate intensity and color temperature for each location and time of day, providing targeted illumination that reduces overall energy consumption while maintaining therapeutic benefits
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
The system effectively reduces the risk of delirium by helping patients maintain a sense of time and orientation, improving patient well-being and reducing healthcare costs and staff stress.
Implementation Method 1
a light source (1030) having a light intensity control device (1020)
Implementation Method 2
The light intensity control device (1020) is configured to control an intensity of light provided by the light source (1030)
Data Source
AI summary
A method for providing light to a room that has a wall includes arranging in the room a light source having a light intensity control device, providing a model for light intensity simulating light conditions in a first period of a day, and operating the light intensity control device in accordance with the model so that light is provided to the room. Further, a system for providing illumination in a room that has a wall includes a light source having one or more individual light sources. The light source of the system also has a light controlling device for controlling intensity and/or direction of light and/or color of light emitted. The system further includes a controller device that controls the light controlling device in accordance with a simulation program simulating changes in daylight over a period of time.