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. 168-3906
Mfr. Part No.BF3100-20B
HK$90.206
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
HK$122.91
Each
units
CCFL White Yes 1 3 Dia. x 100mm - 3mm 100mm - - -
RS Stock No. 197-1254
Mfr. Part No.EA LED40x33-A
HK$55.073
Each (In a Tray of 20)
units
LED Amber - - - - - - - - EA DOGS104x-A
RS Stock No. 197-1255
Mfr. Part No.EA LED40x33-A
HK$60.83
Each
units
LED Amber - - - - - - - - EA DOGS104x-A
RS Stock No. 197-1232
Mfr. Part No.EA LED39x41-GR
HK$43.932
Each (In a Tray of 24)
units
LED - - - - - - - - - EA DOGS104x-A
New
RS Stock No. 197-1257
Mfr. Part No.EA LED40x33-ERW
HK$82.656
Each (In a Tray of 20)
units
LED - - - - - - - - - EA DOGS104x-A
RS Stock No. 534-9849
Mfr. Part No.BF20292-24B
HK$169.27
Each
units
CCFL White Yes 1 2 Dia. x 292mm - 2mm 292mm - - -
RS Stock No. 758-8699
Mfr. Part No.EA LED55x46-W
HK$168.74
Each
units
LED White - 40 - 46 x 55mm - - 46mm 55mm -
RS Stock No. 168-3897
Mfr. Part No.BF20325-24B
HK$91.644
Each (In a Bag of 100)
units
CCFL White Yes 1 2 Dia. x 325mm - 2mm 325mm - - -
RS Stock No. 197-1233
Mfr. Part No.EA LED39x41-GR
HK$61.36
Each
units
LED - - - - - - - - - EA DOGS104x-A
New
RS Stock No. 197-1258
Mfr. Part No.EA LED40x33-ERW
HK$101.05
Each
units
LED - - - - - - - - - EA DOGS104x-A
New
RS Stock No. 197-1289
Mfr. Part No.EA LED94x40-ERW
HK$340.704
Each (In a Tray of 7)
units
LED - - - - - - - - - EA DOGS104x-A
RS Stock No. 534-9928
Mfr. Part No.BF26240-24B
HK$157.06
Each
units
CCFL White Yes 1 2.6 Dia. x 240mm - 2.6mm 240mm - - -
RS Stock No. 758-8655
Mfr. Part No.EA LED55x31-W
HK$115.74
Each
units
LED White - 40 - 31 x 55mm - - 31mm 55mm -
RS Stock No. 534-9861
Mfr. Part No.BF20325-24B
HK$143.58
Each
units
CCFL White Yes 1 2 Dia. x 325mm - 2mm 325mm - - -
RS Stock No. 197-1244
Mfr. Part No.EA LED36x28-ERW
HK$88.767
Each (In a Tray of 25)
units
LED - - - - - - - - - EA DOGS104x-A
RS Stock No. 197-1286
Mfr. Part No.EA LED94x40-A
HK$117.79
Each
units
LED Amber - - - - - - - - EA DOGS104x-A
RS Stock No. 197-1247
Mfr. Part No.EA LED36x28-GR
HK$66.40
Each
units
LED - - - - - - - - - EA DOGS104x-A
RS Stock No. 534-9956
Mfr. Part No.BF26318-20B
HK$143.58
Each
units
CCFL White Yes 1 2.6 Dia. x 318mm - 2.6mm 318mm - - -
RS Stock No. 168-3901
Mfr. Part No.BF26214-24B
HK$119.752
Each (In a Bag of 100)
units
CCFL White Yes 1 2.6 Dia. x 214mm - 2.6mm 214mm - - -