1 | Building Technologies Program eere.energy.gov Public Service of Colorado Ponnequin Wind Farm 

# BUILDING TECHNOLOGIES PROGRAM

Television Sets

The Effects of Illuminance on TV Power and Luminance with

the Use of Automatic Brightness Control Energy Efficiency and Renewable Energy

September 14, 2011 

## Department of Energy2 | Building Technologies Program eere.energy.gov 

# • Power use dependence on luminance

– Review

• How luminance varies with changing room lighting levels

• How power varies with changing room lighting levels

• Luminance versus power charts to further demonstrate varying

current implementations of ABC 

# Overview3 | Building Technologies Program eere.energy.gov 

# 1. User modifies screen settings (e.g., home vs. retail or sport vs.

cinema)

2. Average picture level (APL) of image being displayed changes (as

we see when running the IEC test clip)

3. Televisions modifies its own luminance settings under Automatic

Brightness Control in response to changes in room illuminance

The consequence of increases in screen luminance is always the

same, though

– power use goes up.

How much of TV power use is associated with the production of

light? About 60

- 75% in the units we have measured so far. 

# TVs Can Change Luminance Levels

in Three Ways4 | Building Technologies Program eere.energy.gov 

## Screen Luminance at 0, 10, 30, 50, 100, 150 and

300 Lux

- Small TVs5 | Building Technologies Program eere.energy.gov 

## Screen Luminance at 0, 10, 30, 50, 100, 150 and

300 Lux

- Medium TVs6 | Building Technologies Program eere.energy.gov 

## Screen Luminance at 0, 10, 30, 50, 100, 150 and

300 Lux

- Large TVs7 | Building Technologies Program eere.energy.gov 

## Power Consumption at 0, 10, 30, 50, 100, 150 and

300 Lux

- Small TVs8 | Building Technologies Program eere.energy.gov 

## Power Consumption at 0, 10, 30, 50, 100, 150 and

300 Lux

- Medium TVs9 | Building Technologies Program eere.energy.gov 

## Power Consumption at 0, 10, 30, 50, 100, 150 and

300 Lux

- Large TVs10 | Building Technologies Program eere.energy.gov 

# Luminance/Power v. Illuminance

Power Luminance

Illuminance11 | Building Technologies Program eere.energy.gov 

# Luminance/Power v. Illuminance

Power Luminance

Illuminance12 | Building Technologies Program eere.energy.gov 

# Luminance/Power v. Illuminance

Power Luminance

Illuminance13 | Building Technologies Program eere.energy.gov 

# Summary of Luminance Values at

Various Lux Levels

Luminance (cd/m2) at Various Illuminance Levels (lux)

Illuminance ( Lux ) 0 10 30 50 100 150 300

TV C

- 32" LED

- LCD 41.1 296.9 296.2 296.1 296.7 298.2 298.5

TV J

- 32" LED

- LCD 128.3 128.2 141.8 202.5 238.1 246.9 258.8

TV E

- 42" LED

- LCD 93.8 97.7 130.2 158.7 230.9 247.7 233.8

TV L

- 46" LED

- LCD 72.6 72.3 87.8 113.4 221.2 316.3 363.7

TV D

- 46" CCFL

- LCD 232.3 234.1 240.6 246.5 283.1 300.1 298.7

TV M

- 47" LED

- LCD 18.4 285.7 282.4 283.3 284.5 283.7 283.7

TV K

- 46" LED

- LCD 28.89 236.1 235.9 236.4 236.2 236.1 236.3

TV N

- 52" CCFL

- LCD 165.4 169 186.7 226.6 301.2 301.4 302.2

TV A

- 52" LED

- LCD 92.5 266.9 266.4 266.2 266.5 266.6 266.8

TV G

- 60" Plasma 68.2 75 83.7 84.9 83.7 83.7 84.2

TV B

- 54" Plasma 23.3 78.9 79.7 80.2 79 79.2 79.1

TV P

- 55" Plasma 27 27.1 63.7 63.3 64.4 63.4 62.714 | Building Technologies Program eere.energy.gov 

# Summary of Power Values at

Various Lux Levels

Power (watts) at Various Illuminance Levels (lux)

Illuminance (Lux) 0 10 30 50 100 150 300

TV C

- 32" LED

- LCD 42 83.3 83.6 84 83.3 83.3 83.3

TV J

- 32" LED

- LCD 28.6 28.5 30.2 38.7 42.5 42.5 46.5

TV E

- 42" LED

- LCD 61.8 62.5 62.5 74.4 86.5 91.3 90.2

TV L

- 46" LED

- LCD 43.8 43.8 45.4 48.6 67.2 70.7 85.1

TV D

- 46" CCFL

- LCD 103.8 104 107.8 109.9 130.3 130.1 130.3

TV M

- 47" LED

- LCD 37.3 81.7 79.1 80.4 81.8 81.7 81.9

TV K

- 46" LED

- LCD 28.4 65.7 66.1 66 65.7 65.7 65.6

TV N

- 52" CCFL

- LCD 115.1 115.5 121.9 137.4 165.6 165.7 166

TV A

- 52" LED

- LCD 71.4 91.7 93.0 92.5 91.7 119.8 127.5

TV G

- 60" Plasma 245.8 434.8 433.3 433.4 434.8 433.8 434.7

TV B

- 54" Plasma 111.0 198.4 199.3 199.8 199.2 199.0 188.3

TV P

- 55" Plasma 89.3 89.0 133.8 132.7 144.0 136.7 142.715 | Building Technologies Program eere.energy.gov 

# Power v. Luminance16 | Building Technologies Program eere.energy.gov 

# Power v. Luminance17 | Building Technologies Program eere.energy.gov 

# Power v. Luminance18 | Building Technologies Program eere.energy.gov 

# Power v. Luminance19 | Building Technologies Program eere.energy.gov 

# Power v. Luminance