Display Backlighting

Display backlighting is used to illuminate LCDs (liquid crystal displays), as well as for machine vision, image scanning and task lighting. Unlike frontlights, which illuminate from the front, backlights usually produce illumination from the sides or from the back of the screen.

Types of display backlighting

You can choose from display backlighting in a range of colours (including white, green and yellow) and levels of brightness, depending on the application you need it for. The two main types of display backlight are:

  • LED (light emitting diodes) backlighting – this uses 10 to 18 LEDs arranged in a uniform pattern and usually provides white light.
  • CCFL (cold cathode fluorescent) backlighting – this uses a single straight glass tube, which works much like a normal fluorescent lamp.

Applications of display backlighting

As LCD screens are unable to illuminate themselves, they require a backlight to provide the illumination and make the image on the screen viewable. Apart from being used in computer displays, LCD televisions and smartphones, backlights are also used in small devices such as watches and pocket calculators to improve readability in low-light conditions.


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Description Price Backlight Type Backlight Colours Variable Brightness Number of Pins CCFL Dimensions Dimensions CCFL Diameter CCFL Length Height Width Series
RS Stock No. 168-3898
Mfr. Part No.BF22140-24B
$21.11
Each (In a Bag of 100)
units
CCFL White Yes 1 2.2 Dia. x 140mm - 2.2mm 140mm - - -
RS Stock No. 534-9877
Mfr. Part No.BF22140-24B
$24.84
Each
units
CCFL White Yes 1 2.2 Dia. x 140mm - 2.2mm 140mm - - -
RS Stock No. 168-3982
Mfr. Part No.BF20125-28B
$18.40
Each (In a Bag of 100)
units
CCFL White - 2 2 Dia. x 125mm - 2mm 125mm - - -
RS Stock No. 797-2371
Mfr. Part No.BF20125-28B
$24.84
Each
units
CCFL White - 2 2 Dia. x 125mm - 2mm 125mm - - -
RS Stock No. 168-3906
Mfr. Part No.BF3100-20B
$16.97
Each (In a Bag of 100)
units
CCFL White Yes 1 3 Dia. x 100mm - 3mm 100mm - - -
RS Stock No. 534-9978
Mfr. Part No.BF3100-20B
$23.47
Each
units
CCFL White Yes 1 3 Dia. x 100mm - 3mm 100mm - - -
RS Stock No. 758-8655
Mfr. Part No.EA LED55x31-W
$21.45
Each
units
LED White - 40 - 31 x 55mm - - 31mm 55mm -
RS Stock No. 168-3983
Mfr. Part No.BF22160-24B
$15.375
Each (In a Bag of 100)
units
CCFL White - 2 2.2 Dia. x 160mm - 2.2mm 160mm - - -
RS Stock No. 168-3905
Mfr. Part No.BF26318-20B
$17.63
Each (In a Bag of 100)
units
CCFL White Yes 1 2.6 Dia. x 318mm - 2.6mm 318mm - - -
RS Stock No. 797-2375
Mfr. Part No.BF22160-24B
$24.09
Each
units
CCFL White - 2 2.2 Dia. x 160mm - 2.2mm 160mm - - -
RS Stock No. 534-9956
Mfr. Part No.BF26318-20B
$27.01
Each
units
CCFL White Yes 1 2.6 Dia. x 318mm - 2.6mm 318mm - - -
RS Stock No. 534-9984
Mfr. Part No.BF3228-21B
$24.30
Each
units
CCFL White Yes 1 3 Dia. x 228mm - 3mm 228mm - - -
RS Stock No. 168-3907
Mfr. Part No.BF3228-21B
$16.34
Each (In a Bag of 100)
units
CCFL White Yes 1 3 Dia. x 228mm - 3mm 228mm - - -
RS Stock No. 168-3900
Mfr. Part No.BF26188-20B
$18.22
Each (In a Bag of 100)
units
CCFL White Yes 1 2.6 Dia. x 188mm - 2.6mm 188mm - - -
RS Stock No. 535-0007
Mfr. Part No.BF3380-20B
$32.48
Each
units
CCFL White Yes 1 3 Dia. x 380mm - 3mm 380mm - - -
RS Stock No. 171-1889
Mfr. Part No.EA LED68X51-W
$38.24
Each (In a Box of 15)
units
LED White - 40 - 51 x 68mm - - 51mm 68mm -
RS Stock No. 534-9899
Mfr. Part No.BF26188-20B
$24.47
Each
units
CCFL White Yes 1 2.6 Dia. x 188mm - 2.6mm 188mm - - -
RS Stock No. 758-8734
Mfr. Part No.EA LED68x51-W
$43.28
Each
units
LED White - 40 - 51 x 68mm - - 51mm 68mm -
RS Stock No. 758-8664
Mfr. Part No.EA LED55x31-RGB
$42.37
Each
units
LED Full Colour (RGB) - 40 - 31 x 55mm - - 31mm 55mm -
RS Stock No. 171-1881
Mfr. Part No.EA LED55X31-RGB
$35.00
Each (In a Box of 25)
units
LED Full Colour (RGB) - 40 - 31 x 55mm - - 31mm 55mm -
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