Heating LED strips on chipboard (cabinet simulation)

Heating of different types of led strips on chipboard.
How hot are the LED strips on the chipboard without an aluminum profile
How hot are these LED strips on the chipboard with an additional diffuser?

Measurement description

We measured the LED chips’ temperature and the strip base hanging in the air in the last experiment. Now we simulated mounting the strip under the cabinet in a groove 1/2” deep.

• At the bottom of the groove. Direct contact between the LED strip and the chipboard. Without an optical diffuser.
• At the bottom of the groove. Direct contact between the LED strip and the chipboard. Additionally, we install a diffuser. The diffuser/shield closes the ambient air access and blocks the heat dissipation from the LED chips through the air. We do the temperature measurement immediately after removing the diffuser to access the measuring device.

Test bench and measuring instruments

We created a special test bench.
The left photo — is without a diffuser, and the right photo — is with a diffuser.

We measured the temperature of each sample after 30 minutes of operation. During this time, the LED strip is fully warmed up and its temperature stabilizes.

Generation and dissipation of heat from the LED chip without a diffuser.

Generation and dissipation of heat from the LED chip with a diffuser.

We make sure that the 24V power supply voltage remains constant and we measure the temperature of the LED strip chips in a room with an air temperature of 73 deg F.
We use a professional Fluke TiS65 thermal imager (accuracy for temperatures 80–160 deg F < 3 deg F).

Fluke TiS65

This device records the temperature of the hottest chips in the central part of the field of view.

Example of automatic search and display of the hottest point in the central part of the field of view.

We also record the heating of the chipboard on the back side. We evaluate the effects of the chipboard’s thermal conductivity and the danger of heat to objects inside the cabinet.

Results of chip temperature measurements of LED strips on chipboard

Thermal images. LED chips on chipboard without the diffuser

Thermal images. LED chips on chipboard with diffuser

Thermal images. Diffuser outside

Thermal images. Chipboard backside with LED strip without a diffuser

Thermal images. Chipboard backside with LED strip with diffuser

What’s coming up in the next posts?

• Samples of LED strips on aluminum profile in the air
• Samples of LED tapes on aluminum profile in chipboard
• Samples of LED tapes on Extruded polystyrene foam (you are wondering why?)
• Summary

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