COG LCD Module Design Manual

┃What Is a COG LCD Module?

• A COG (Chip On Glass) LCD module is a liquid crystal display technology where the driver IC is directly packaged onto the glass substrate. Compared to traditional COB (Chip On Board) or TAB (Tape Automated Bonding) modules, COG modules offer advantages such as simpler structure, smaller size, and thinner thickness. This design significantly simplifies the module structure, while improving production efficiency and product stability.

• Since the driver IC is mounted directly on the glass, no additional PCB or flexible circuit board is required to support the IC. This makes it particularly suitable for end applications with strict requirements on size, weight, and thickness, such as handheld medical devices, wearables, smart home products, and industrial control systems.

• Eileen Technology offers a range of standard COG LCD display modules and supports custom specifications and design adjustments based on customer needs. 

┃Key Features

• Slim Design: The driver IC is directly mounted on the glass substrate, saving space and making it ideal for product designs with strict thickness limitations.

• Low Power Consumption: The COG LCD module operates at extremely low current, extending battery life, making it particularly suitable for handheld devices.

• High Contrast Display: The high-quality liquid crystal material combined with polarizers offers clear and detailed display performance.

• Flexible Interface Options: Supports SPI, I2C, parallel, and other interfaces, facilitating integration with various microcontrollers.

• Variety of Display Modes: Offers multiple display technologies such as STN, FSTN, VA, with options for positive or negative display modes to suit different application environments.

┃Applications

The COG LCD display modules are characterized by their thin form factor, low power consumption, and high stability, making them ideal for integration into products that require compactness and high performance. Typical applications include:

• Medical Equipment: Devices such as blood glucose meters, blood pressure monitors, ECG machines, and thermometers, which require stable, long-duration operation and clear, accurate displays.

• Industrial Control: Used in instrumentation, HMIs, process control panels, and on-site monitoring systems, offering precise data visualization in complex environments.

• Smart Home Systems: Devices like thermostats, access control systems, energy management controllers, and smart panels, providing essential information in a compact display format.

• Consumer Electronics: Wearables, smart bands, remote controls, and electronic dictionaries, providing clear and efficient interfaces in small form factors.

• Automotive Devices: Dash cameras, TPMS, and charging station display modules, delivering real-time data in a variety of driving scenarios.

• Measurement Instruments and Handheld Devices: Applications such as electronic range finders, digital multimeters, and testing and analysis tools, which require stable, visible outputs in demanding conditions. 

Eileen-Tech's COG LCD Modules are the ideal choice for high-performance electronic products, offering a balance of compact design, low power consumption, and excellent visibility.

┃Customized Services

Eileen Technology specializes in COG LCD design and mass production, offering end-to-end customized services to meet client-specific display module requirements. Our engineering team is equipped to provide the following customizations:

• LCD Panel Size and Resolution Adjustment: Supports various resolutions (e.g., 128x64, 128x32, 192x64) and display area sizes (VA/AA), optimizing the display performance based on product size.

• Driver IC Selection and Configuration: Based on application requirements, we select the appropriate driver IC brands and control methods (SPI, I2C, Parallel) to ensure system stability and performance.

• FPC Cable Design: Customization of FPC cable length, pin count, pad configuration, and contact direction (Top/Bottom Contact), with optional customer logo or part number printing.

• Backlight Module Design: Offers LED color options (white, yellow-green, blue, etc.), brightness levels, and voltage selections, with backlight structure optimization for uniform light distribution.

• Polarizer Type and Viewing Angle Optimization: Polarizer selection (transmissive, semi-transmissive, reflective) and viewing angle configuration (e.g., 6:00, 12:00) tailored to application requirements for optimal visibility in different environments.

• Structural Design and Integration: Assistance with designing module shape, reinforcement bracket structures, and adding locating holes or screw holes to facilitate integration with mechanical components.

• Working Temperature Range: Adjustments to operating and storage temperature specifications (e.g., industrial-grade -30°C to +80°C) for different environmental conditions to enhance module reliability.

• Display Content and Font Customization: Services for graphical interface design, Chinese font creation, custom icon designs, and MCU software integration support.

Eileen Technology delivers not only standard products but also offers flexible solutions to accelerate development and reduce time-to-market. From sample design, trial production to mass production, our professional team ensures precise implementation of every customization requirement.

┃Recommendations

• Operating Voltage: Confirm the operating voltage and driving method based on the actual IC specification sheet.

• Viewing Angle & Polarizer: Select the appropriate viewing angle (6:00 or 12:00 direction) and polarizer type (reflective, semi-transmissive, transmissive) according to your application needs.

• Backlight Configuration: Compatible with LED backlight modules, available in various colors and brightness levels.

• FPC Customization: FPC cable length, pin count, and connection orientation are customizable based on customer requirements.

• Operating Temperature: The standard model operates within the range of 0°C to +50°C, while the industrial model supports temperatures from -20°C to +70°C, with adjustable specifications as needed.

┃Product Overview

The COG LCD Module is designed with a compact structure, offering superior shock resistance. It supports low power operation and a variety of backlight configurations, making it ideal for outdoor devices, industrial control systems, and battery-driven applications. With options from STN to FSTN, and varying resolutions and screen sizes, it ensures full compatibility across different stages of your project. 

🔎 Find the COG LCD module that best suits your needs now.