The Precision Link: Deciphering the Technology of Conductive Rubber Connectors in LCM Display Modules

  In today's smart and interconnected world, clear and reliable display interfaces are the cornerstone of human-machine interaction.The core carrier of this experience is the Liquid Crystal Display Module (LCM). As the key product delivered by lcd display manufacturers, the LCM integrates the liquid crystal display device, driver IC, PCB, backlight, and structural components into one cohesive unit, achieving the complete function of converting circuit signals into visual images. Whether for standard products or deeply customized LCD screens, their stability begins with the reliability of every connection point within the LCM. Among these, a seemingly simple yet crucial component—the conductive rubber connector (often called a zebra strip)—serves as the "invisible bridge" ensuring unimpeded signal transmission between the lcd screen and the circuit board.

Conductive Rubber Connectors: The "Signal Bridge" Inside LCMs

  Conductive rubber connectors, formed by alternately laminating conductive and insulating layers, provide stable electrical connection between the LCD screen and the PCB through elastic compression. Their performance directly determines the integrity and clarity of the display signal.

Material Selection: The Art of Balancing Solid Silicone and Foam Silicone

Solid Silicone Material: Offers moderate hardness (35°~45°) and lower cost. However, it is prone to static electricity, which can attract dust, requiring extra attention to the cleanliness of the assembly environment.

Foam Silicone Material: Made by foaming silicone, it has a softer texture (hardness 20°~30°), better resistance to deformation, and is less prone to contamination. It is more suitable for precision lcd module applications with high cleanliness requirements.

Precision Design Parameters: Ensuring Reliable Connections

1.Conductive Layer Pitch: Common pitches are 0.05mm, 0.1mm, and 0.18mm. The design must ensure that each PCB pad contacts at least 3 conductive carbon layers (4-5 layers are recommended for a 0.05mm pitch). This is a detail strictly controlled by CNK in the design of custom LCD screens.

2.Conductive Layer Width: Ranging from 0.4mm to 1.0mm, the width relates to the connector's hardness and affects the overall compression ratio design. CNK engineers make targeted selections based on the module structure (0.6mm width is common for connectors ≤2.0mm, 0.8mm for those ≥2.0mm).

3.Compression Ratio Control: The ideal compression ratio is controlled between 10% and 15%. A ratio below 10% can lead to unstable contact impedance, while above 15% may cause deformation of the connector or PCB. CNK ensures the correct compression amount through precise calculation of the assembly height (h), guaranteeing long-term reliability.

  From basic monochrome displays to complex HMI interfaces, the reliability of every lcd module relies on a deep understanding and precise control of key components like conductive rubber connectors. As an experienced lcd display manufacturer, CNK Electronics not only delves into material properties and parameter design to ensure low impedance and high stability in signal transmission but also extends this mastery of details to comprehensive custom LCD solutions. We believe it is these unseen "precision links" that connect technological innovation with quality reliability, supporting CNK and our customers as we collectively advance towards a more exceptional display future.

About CNK

  Founded in Shenzhen in 2010, CNK Electronics (CNK in brief) expanded the world leading factory in Longyan, Fujian in 2019. It is a national specialized and innovative "little giant" enterprise that specializes in the design, development, production and sales of display products. CNK provides customers with a full range of cost-effective small and medium-sized display modules, solutions, and services with excellent quality worldwide. Oriented in technology and high quality, CNK keeps sustainable development, works to offer customers  better and stable services.