Sunlight Readable 128x64 COB LCD Module with Amber Backlight and High Contrast Display for Outdoor Instrumentation

This product is a 12864 LCD dot matrix display capable of displaying graphics with a resolution of 128 columns x 64 rows of pixels. The display utilizes an STN mode with an amber LED backlit LCD, presenting amber background with black characters, achieving high contrast and a wide viewing angle. The module contains a dedicated driver chip, adopts COB production technology, and connects to the master MCU via an 8-bit parallel LCD interface for displaying various images and text. The internal compensation circuit ensures excellent display performance even under wide temperature conditions.

This product is a 12864 LCD, capable of displaying graphics with a resolution of 128 columns x 64 rows of pixels. The display utilizes STN with an amber LED backlit LCD, presenting amber background with black characters, achieving high contrast and wide viewing angle display. The module contains a dedicated driver chip, adopts COB production technology, and connects to the master MCU via an 8-bit parallel LCD interface for displaying various images and text. The internal compensation circuit ensures excellent display performance even under wide temperature conditions. These types of graphic dot matrix display modules are available in resolutions such as 122x32, 128x64, 128x128, 144x32, 160x160, 160x32, 160x80, 192x64, 240x64, 240x128, 320x240, etc. Customers can select different LCD backlight colors and different mode glass screen combinations according to their product requirements.

Q1: What are the key advantages of choosing a 128x64 graphic LCD module with COB technology and amber backlight?
A1: This combination offers distinct benefits for demanding applications. The COB (Chip-On-Board) construction ensures maximum durability against shock, vibration, and environmental contaminants. The amber (typically ~590nm) LED backlight provides high contrast with reduced blue-light emission, which is ideal for preserving night vision in low-light environments (avionics, marine) and minimizing eye strain in medical or industrial panels monitored for long durations.

Q2: What controller does this 128x64 module use, and what interface options are available?
A2: The module typically employs a common monochrome graphic LCD controller (e.g., ST7567, UC1701, or compatible). Standard interfaces include SPI (Serial Peripheral Interface) and 8-bit Parallel (6800/8080-series). Some models offer I2C via an adapter board. The choice depends on your MCU's available pins and required communication speed.

Q3: What is the typical contrast ratio and viewing angle? How is contrast adjusted?
A3: The contrast is primarily governed by the voltage supplied to the LCD's V0/VEE pin. The module includes an integrated charge pump or regulator to generate this voltage. Contrast is software-adjustable via the controller's internal resistor ladder or an external potentiometer (model-dependent), allowing optimization for the amber backlight and specific viewing angles (typically +50° to -70° in all directions).

Q4: Can the amber backlight brightness be controlled?
A4: Yes. The backlight is comprised of amber LEDs driven in series/parallel. Brightness can be controlled via Pulse-Width Modulation (PWM) on the backlight power line or, in some models, through a dedicated brightness control pin. This allows dynamic adjustment for ambient light conditions.

Q5: What is the operating temperature range for this industrial-grade module?
A5: Standard industrial-grade modules operate from -20°C to +70°C. The COB construction and amber LED technology support stable performance across this range. Extended temperature ranges (e.g., -30°C to +85°C) can be offered for military or automotive-grade applications.

Q6: How do I integrate this graphical module into my system? Is there development support?
A6: Integration requires connecting power (typically 3.3V or 5V logic, with a separate backlight supply), the chosen interface lines (SPI/Parallel), and the contrast voltage line. We provide detailed datasheets, pinout diagrams, and initialization code examples in C for popular microcontrollers. Many open-source and commercial graphics libraries (e.g., u8g2, Embedded GUI) offer direct driver support for these common controllers.

Q7: Can custom graphics, logos, or fonts be displayed?
A7: Absolutely. As a bitmap graphic display, any monochrome image can be rendered. You define a font or graphic as a pixel array (bitmap) in your code and send it to the module's display data RAM (DDRAM). The controller's page/column addressing architecture is well-documented for custom rendering routines.

Q8: Is this module suitable for outdoor or sunlight-readable applications?
A8: With the following configurations, it can be:

• High-Brightness Amber Backlight: Increases luminance to overcome ambient light.

• Transflective or High-Transmittance Polarizer: Maximizes the use of ambient light.

• Anti-Glare (AG) Surface Treatment: Diffuses reflected light, reducing glare.

• Optical Bonding: Laminating the LCD to the cover glass reduces internal reflections and improves contrast in direct sunlight.

Q9: What are the primary application scenarios for this module?
A9: Its robustness and display characteristics make it ideal for:

• Industrial HMIs: Control panels, PLC interfaces, test equipment.

• Medical Devices: Portable monitors, diagnostic equipment where low eye strain is critical.

• Transportation: Automotive dash displays, avionics, marine instrumentation.

• Telecom & Networking: Equipment status displays.

• Security Systems: Keypad and alarm system interfaces.

Q10: What customization options are available?
A10: We offer several value-added customization services:

• Optical Stack: Anti-glare, anti-reflective, transflective polarizers; optical bonding.

• Mechanical: Custom cutouts, mounting holes, metal bezels/frames, integrated touch panels (resistive).

• Electrical: Specific interface pinouts, integrated negative voltage generator, on-board voltage regulation.

• Backlight: Adjustment of brightness, uniformity, and specific amber wavelength.

Q11: What are the sample availability, MOQ, and lead time?
A11: Engineering samples are available for qualified projects. Minimum Order Quantity (MOQ) for standard models can be as low as 100-200 units. For custom designs, MOQ is negotiated based on tooling and setup. Standard product lead time is 6-8 weeks; custom projects may require 10-12 weeks or more.

Q12: What is the expected lifetime and warranty?
A12: The LED backlight lifetime (to 50% initial luminance) typically exceeds 50,000 hours at nominal current. The COB module itself, under specified operating conditions, has a design life of over 10 years. The product is backed by a standard 12-month warranty against manufacturing defects.