Backlight-guide-board is the primary component of keyboard display, its brightness is related to the display effect of the whole keyboard.
LGF Module is composed by Guide-film , Diffusion film and Reflection Film .
The uniformity of backlight is mainly related to the dot of the LGF , which is located at the bottom of the LGF. Because of the direct LED light , the single-side backlight emitting gradually increases from the nearby position to the opposite side, becomes larger and larger, which is conducive to the reflection of light in a large area
KEYBOARD LGF Module Feature :
a) Good Luminous Effect, Uniform Brightness, High Light Intensity
b) Light Weight ,Thinner Thickness and Small Volume
c) Save LED lamps ,Save Power Consumption
d)Good Stability , Long life-time
KEYBOARD LGF Module Working Principle
The LED lamp will turn on after switch on , the light emit to every area through the dot of LGF , Using the principle of light reflection and refraction, combined with special optical software design, to make "dot light source" enlarge "plane light source".
Major Technical Parameters & Advantages of Metal Dome Array
Item
Description
TECHNICAL INDEX
1
LONG LIFE-TIME
Round ,Oval, four - legged, triangular,
rectangular, three - point side, irregular
Stainless Steel ,Nickel Plating ,
Silver Plating & gold Plating
Dimple Numbers : 0/1/3/4/5 dimple
LIFE-TIME : 300 ~3000 Thousand Times
In compare of initial value ,
The change rate <30% after 1M press-test
2
Click %
Force:100gf~450gf, Tolerance : ±20gf
Normal Condition
3
Stroke
Customize in accordance with Customer ‘s requirement
0.12~0.6mm ,Spec. various by different METAL DOME
4
Dimension Tolerance
Position dimension tolerance : + /- 0.1mm
5
GoodWeatherproof Resistance
Under the conditions of 55±2℃,R.H.95% , Replacement 24H ,
and then resume 2H under the normal room temperature
6
Good Corrosion Resistance
High Temperature can bear : +70℃
Lower Temperature can bear : -40℃
7
Tape Adhesive Test
0.6↑(Unit:kgf/inch)
8
Stable Tape Shrinkage rate
MD(%):0.5 ↓ CD(%):0.3 ↓
(Unit:100℃*40mins)
9
Small Instantaneous
Contact Resistance
(Nickel Plating ) <1Ω, ( Stainless Steel )<3Ω
10
Total Thickness of
Base materials
0.05mm,0.075mm,0.1mm,0.125mm,0.15mm;
Normal Thickness Spec.
11
Light-Guide-film Uniformity
>75%
Shenzhen Guanghongda Technology Co, Ltd has rich experience in exhibition & participation. Through the face-to-face communication in exhibition, to strengthen our powers as an integrated set of industry and trade company.
F A Q
Q1: Are you Trading company or manufacturer ?
A:We are a Professional Trading & Manufacturer Integrated .
Q2 :Can you offer OEM Service ?
A:Surely Okay , we have Seasoned OEM service experience .
Q3: what is the Lead time of sample ?
A :It takes 2-7working days depends .
Q4: How fast can i get the Quotation ?
A :I am smart to understand what customers want , reply quickly , Sometimes you can receive my email within 10mins., even in deep evening such as 11P.m or 12P.m
Please do not hesitate to contact with us , if you have any inquires .
KEYBOARD LGF Module
Backlight source
Light guide dot mold customized
EVA Foam
Insulation Series
EMI Series
Water-proof Series
EVA Foam
EVA Foam 
KEYBOARD LGF Module
