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  • 2019/12/20Click:9157 Share:FaceBook Share:Twitter

    Custom OEM ONE-STOP SOLUTION manufacturing New design Light guide film module for lighting laptop KEYBOARD

    1.jpgKeyboard backlight moudle

    • 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 Moudle application


    KEYBOARD LGF Module Feature

    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".

    KEYBOARD LGF Module Flow Chart


    Major Technical Parameters & Advantages of Metal Dome Array






    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


    Click %

    Force:100gf~450gf, Tolerance : ±20gf

    Normal Condition



    Customize in accordance with Customer ‘s requirement

    0.12~0.6mm ,Spec. various by different METAL DOME


    Dimension Tolerance

    Position dimension tolerance : + /- 0.1mm


    Good Weatherproof Resistance

    Under the conditions of 55±2℃,R.H.95% , Replacement 24H ,

    and then resume 2H under the normal room temperature


    Good Corrosion Resistance

    High Temperature can bear : +70

    Lower Temperature can bear : -40


    Tape Adhesive Test



    Stable Tape Shrinkage rate

    MD(%):0.5 ↓ CD(%):0.3 ↓



    Small Instantaneous

    Contact Resistance

    (Nickel Plating ) <, ( Stainless Steel )<


    Total Thickness of

    Base materials


    Normal Thickness Spec.


    Light-Guide-film Uniformity


    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 .

    Inquiry about:KEYBOARD LGF Module
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