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What is LGF Dome Array and How does it work ?
LGF metal dome array , which full name is Light Guide Film , it is a new design . which used to replace LED in function , in comparsion with LED , lighting Uniformity; When we add a LGF on current normal double layer or EMI dome array, it becomes a LGF dome array. It can achieve great result of light distribution.see from the design , the light under keypad is coming from the LED on PCB motherboard. We need to put about 8-10 pieces LED on each board, but if the design changed to use LGF, then we can save several LED, as well as SMT fee.
What is the LGF DESIGN PRINCIPLE & What is the Advantage ?
LGF, at least one surface out of front and rear surfaces of the light guide film is formed with a pattern such that density increases as distanced from a light source to allow light to be uniformly supplied to the keypad, or is concentratively formed with a pattern at a particular region of the light guide film to allow the light to be concentratively supplied to a particular region of the keypad.
PRODUCT PHOTOGRAP
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MAJIOR TECHNICAL PARAMETERS & ADVANTAGES OF METAL DOME ARRAY
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| Item | Description | TECHNICAL INDEX |
| 1 | LONG LIFE-TIME |
Shape Type : Round , Oblong , 4-legged , Trianglar , Rectangular , Irregular
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| Appearance Treatment Type : Stainless Steel ,Nickel plated , Silver Plated , Gold plated | ||
| Dimple numbers : 0/1/3/4/5 | ||
| Life-time : 300~5000K Hits | ||
| Force & Click Ratio : In compare of initial value , the change rate<30% after 1M hits | ||
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2 |
Click % | Force:100gf~450gf , Tolerance :+/-20gf |
| Click Ratio :50+/-10% , | ||
| 3 | Stroke | Custom in accordance with Customer's requirement |
| 4 | Dimension Tolerance | Position dimension tolearance :+/-0.1mm |
| 5 |
Weather-proof Resistance |
Under the conditions of 55±2°C , R.H. 95%,Replacement 24H , resume 2H under the normal room temperature |
| 6 |
Corrosion Resistance |
High Temp. can bear : +70°C Low Temp. can bear : -40°C |
| 7 | Tape Adhesive Test | 0.6↑(unit : kgf/inch) |
| 8 |
Stable adhesive Shrinkage Rate |
MD(%):0.5↓ CD(%):0.3↓ |
| 9 |
Small Instantant Contact Resistance |
Nickel Plating <1Ω Stainless Steel <3Ω |
| 10 |
Total Thickness of Base Material |
0.05mm,0.075mm,0.1mm,0.15mm for normal thickness Spec. |
| 11 | Light-Guide Film Uniformity | >75% |
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 .
+86-755-27903569
+86-18922847849
sales@metaldome.com
