Ambient Light Sensor Cooling Control for Display Thermal Inertia
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic displays face challenges in managing thermal inertia and energy consumption when operating in high ambient temperatures and direct sunlight, as they generate significant heat due to increased brightness and radiative heat transfer, making it difficult to cool them efficiently.
Innovation Solution
The system uses ambient light sensors to apply a correction factor to temperature data, allowing for preemptive engagement of cooling fans to mitigate temperature rises by adjusting fan speeds based on ambient light levels, thereby reducing energy consumption and thermal inertia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cooling fans are engaged only after temperature threshold is reached, then the display can operate with lower energy consumption during normal conditions, but the display experiences large temperature rises requiring large amounts of power to cool
Solution Approach 1:
The system performs preliminary cooling action by engaging the fan assembly before the temperature threshold is actually reached. The controller monitors temperature and activates cooling preemptively when conditions indicate temperature rise is likely, thereby reducing the magnitude of temperature increase and the energy required for subsequent cooling.
Solution Approach 2:
The system applies preliminary anti-action by counteracting potential heat accumulation before it becomes significant. By detecting early signs of temperature rise and activating cooling fans in advance, the system prevents large temperature excursions that would require high-power cooling interventions later.
2Adaptability or versatility
If the display operates in high ambient temperatures and direct sunlight, then the display can be used in more environments, but the internal temperature rises requiring more cooling power
Solution Approach 1:
The system uses ambient light sensors to detect sunlight exposure and preemptively activates cooling fans before temperature-critical conditions develop. This preliminary cooling action enables the display to maintain operational stability in high-ambient-temperature environments without requiring excessive cooling power.
Solution Approach 2:
The system introduces ambient light sensors as intermediary detection devices that sense environmental conditions (sunlight exposure) before they translate into critical temperature rises. This intermediary detection enables proactive cooling control, reducing the cooling power needed while maintaining environmental adaptability.
3Area of stationary object
If larger screen sizes are used, then the display provides better viewing experience, but more heat is generated and transmitted into the display
Solution Approach 1:
The system implements preliminary cooling by monitoring temperature at multiple locations across the display and activating fan assemblies preemptively in response to detected heat accumulation. This distributed temperature monitoring and proactive cooling counteracts the increased heat transmission inherent in larger screen sizes.
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 effectively anticipates and reduces temperature increases in electronic displays by optimizing fan speeds in response to ambient light, lowering energy consumption and extending the lifespan of display components.
Implementation Method 1
The exemplary embodiments herein use the data from an ambient light sensor in order to apply a correction factor to the actual temperature data
Implementation Method 2
Some modern displays may move some type of cooling gas with a fan assembly, either circulating within the display (closed loop) or passing through the display (ingested/exhausted or open loop)
Implementation Method 3
the cooling gas can begin flowing and mitigate any potential rise in temperature
Data Source
AI summary
A system for controlling the cooling fan within an electronic display based on the amount of ambient light present. An ambient light sensor is used to measure the amount of ambient light which is contacting the display. To anticipate a temperature rise and lower the thermal inertia of the display, the fan speed is increased when high ambient light levels are measured at the exterior of the display. The ambient light sensor data may be used to apply a temperature correction factor to a temperature sensor within the display. Alternatively, the ambient light sensor data may be used to apply a fan speed correction factor to a desired fan speed (calculated based on a temperature sensor within the display). Multiple systems or methods can be used simultaneously within the display to cool several components which may heat and cool at different rates relative to one another. The various systems can have similar or different logic depending on the amount of cooling needed and the manner in which the cooled-components produce/absorb heat.