Description
I. Product Overview
The HTG12864-141-31W-10C10-V01 is a high-quality monochrome dot matrix 128×64 COG LCD Module developed by HOTHMI. This advanced display utilizes FSTN positive transflective technology and features a resolution of 128×64 pixels with a standard 6 o’clock viewing direction, making it exceptionally readable across various lighting environments, including intense outdoor sunlight. The module is built around the high-performance ST7567 controller driver, supporting smooth 8080/6800 parallel interfaces as well as an efficient 4-wire SPI serial interface. With a 1/64 duty cycle and 1/9 bias driving scheme, it ensures outstanding display contrast and operational stability.
In terms of physical specifications, the 128×64 COG LCD Module compact outer dimensions of 45.6×34.2×4.3mm greatly facilitate slim and lightweight terminal device designs. It operates at a supply voltage of 3.3V and comes with a high-efficiency white LED backlight that provides bright and uniform illumination for nighttime use. Furthermore, this screen offers excellent durability and environmental resilience, with an operating temperature range of -20°C to +70°C and a storage temperature range of -30°C to +80°C. It is widely suitable for smart instruments, industrial controls, portable medical equipment, and various intelligent hardware terminals, making it an ideal choice for implementing low-power, high-reliability monochrome dot matrix display solutions.
II. Core Product Highlights
This industrial-grade 128×64 COG LCD Module stands out among similar monochrome dot matrix displays due to its unique display technology and electrical characteristics. Its core highlights include:
- FSTN Positive Transflective Technology for Excellent Outdoor Sunlight Readability: Adopting the FSTN Positive Transflective display mode, it combines both transmissive and reflective properties. Indoors, the white LED backlight provides bright and uniform visuals; under direct outdoor sunlight, it effectively utilizes ambient reflected light to deliver a “brighter in sunlight” viewing experience.
- Highly Integrated ST7567 Controller: Built around the industry’s most mature and well-documented ST7567 driver IC, it features an integrated boost circuit, voltage regulator, and voltage follower. The external circuitry is extremely simple, requiring only a few 1μF SMD capacitors for stable operation.
- Multi-Interface Compatibility for Flexible Development: The 128×64 COG LCD Module defaults to supporting the efficient and flexible 4-wire SPI serial interface (significantly saving MCU I/O pins), while also maintaining full compatibility with common 8080 and 6800 8-bit parallel system buses to accommodate different hardware architecture preferences.
- Ultra-Compact Miniature Form Factor: With overall dimensions of just 45.6 x 34.2 x 4.3 mm, this module provides a generous active area (128×64 pixel dot matrix) while its slim profile allows seamless integration into various portable handheld terminals with stringent space requirements.
- Superior Wide-Temperature Industrial Tolerance: Specifically engineered for harsh environments, it supports an operating temperature range of -20°C to +70°C and a storage temperature range of -30°C to +80°C, ensuring reliable operation in extreme cold or heat, and guaranteeing long-term stability in industrial, automotive, and outdoor equipment.
III. Interface Pin Description
The 128×64 COG LCD Module features a standard 10-pin FPC flexible flat cable interface.
IV. Core Application Scenarios
Thanks to the high reliability of Chip-on-Glass packaging and the excellent sunlight readability provided by FSTN transflective technology, this 128×64 COG LCD Module is widely adopted across the following industries and applications:
- Smart Industrial Instruments and Measurement Equipment: Including digital power meters, digital multimeters, environmental air quality detectors, process control panels, etc. Its wide temperature range and high shock resistance ensure stable operation in factory environments with strong magnetic fields and vibration.
- Medical Healthcare and Portable Diagnostic Devices: Portable blood glucose meters, pulse oximeters, handheld ultrasound devices, etc. The high contrast of FSTN technology delivers precise, unambiguous data display for healthcare professionals.
- Smart Agriculture and Outdoor Handheld Terminals: Such as GPS handheld devices, golf laser rangefinders, and portable soil composition analyzers. The 128×64 pixel resolution is ideal for displaying various icons, menu parameters, and simple battery percentage indicators.
- Smart Home Control Panels and IoT Hardware: Including wall-mounted temperature/humidity controllers, smart access control display terminals, and energy storage charging pile displays. Its low-power design enables long standby times in battery-powered IoT devices.
V. Technical FAQ of 128×64 COG LCD Module
Q1: What voltage and current are required to drive the backlight of this 128×64 COG LCD Module?
A1: This 128×64 COG LCD Module uses a high-efficiency white LED as the backlight. According to the official electrical specifications, the typical forward operating voltage for the backlight is 3.0V, with a typical drive current of 30mA (maximum not exceeding 40mA). In practical circuit design, it is recommended to control the backlight via the microcontroller’s PWM signal or a constant-current drive source with a series current-limiting resistor. This approach significantly extends backlight lifespan and enables brightness adjustment.
Q2: How should the timing be correctly configured when using the 4-wire SPI serial communication mode?
A2: When using the 4-wire SPI interface for high-speed data transmission, please configure your microcontroller’s SPI clock to sample on the rising edge. At a 3.3V operating voltage, the module’s SPI clock cycle supports a minimum of 50ns (equivalent to a maximum SPI rate of up to 20MHz), with a data setup time requirement greater than 20ns. When writing data, remember to toggle the A0 pin level to switch between data and command streams in real time.
