{"product_id":"128x64-st7920-graphics-lcd-display-green-spi","title":"128x64 ST7920 Graphics LCD Display Green SPI","description":"\u003cmeta name=\"description\" content=\"Buy 128x64 ST7920 Graphics LCD Display Green SPI online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\n\u003ch1\u003e128x64 ST7920 Graphics LCD Display Green SPI\u003c\/h1\u003e\n\n\u003cp\u003eThe 128x64 ST7920 Graphics LCD Display is a monochrome graphical liquid crystal display module featuring 128 columns by 64 rows of pixels with a green backlight and SPI serial communication interface. This display is widely used by embedded systems engineers, IoT developers, and hobbyists who need a compact yet capable visual output solution for microcontroller projects including data logging systems, industrial meters, and real-time monitoring applications. It solves the critical challenge of providing detailed graphical information display in space-constrained applications while maintaining low power consumption and simple digital interfacing through the SPI protocol.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\n\u003cp\u003eThe ST7920 is a comprehensive LCD driver IC that manages the entire 128x64 pixel matrix through an intelligent multiplexing architecture. The display operates by dividing the 8192 total pixels into manageable segments that the driver refreshes sequentially, creating the illusion of a continuously lit image. The SPI interface communicates with microcontrollers using three primary signal lines: Serial Clock (SCK), Serial Data Input (SDI), and Chip Select (CS), making it compatible with Arduino, Raspberry Pi, STM32, and PIC microcontroller platforms. The green monochrome display offers excellent contrast ratios and viewing angles, making it suitable for applications requiring extended operational hours without eye strain.\u003c\/p\u003e\n\n\u003cp\u003eWhat distinguishes this particular model is its dual-mode capability supporting both parallel and serial communication protocols, though this version emphasizes the SPI serial interface for simplified wiring and reduced pin requirements. The integrated LCD driver eliminates the need for external multiplexing circuitry, significantly reducing component count and design complexity. The 5V single supply voltage requirement and typical current draw of 100-150mA during normal operation make it ideal for battery-powered and portable embedded systems. The green LED backlight provides superior visibility in various lighting conditions compared to standard blue or white alternatives, while the monochrome format ensures predictable rendering of text and graphics without color depth complications.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eDetails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eGraphical LCD Display Module with Integrated Driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eST Microelectronics (ST7920 Controller)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal\/Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7 days on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping\u003c\/td\u003e\n\u003ctd\u003e1-5 days from Bengaluru\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003e7-8 days across India\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003e24\/7 via Email and WhatsApp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e128 x 64 pixels (8192 total pixels)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Type\u003c\/td\u003e\n\u003ctd\u003eMonochrome Graphical LCD (STN type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBacklight Color\u003c\/td\u003e\n\u003ctd\u003eGreen LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eSerial Peripheral Interface (SPI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC (single supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e100-150mA typical (backlight on)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePixel Size\u003c\/td\u003e\n\u003ctd\u003e0.5mm x 0.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Dimensions\u003c\/td\u003e\n\u003ctd\u003e93mm x 70mm x 12mm (approximately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViewing Angle\u003c\/td\u003e\n\u003ctd\u003e160 degrees (horizontal and vertical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-10°C to +60°C (operating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e128x64 Pixel Matrix Resolution: Provides 8192 addressable pixels enabling detailed graphical representation of charts, waveforms, and complex user interfaces on compact embedded systems\u003c\/li\u003e\n\u003cli\u003eIntegrated ST7920 Driver IC: Eliminates external multiplexing circuitry and simplifies microcontroller integration through built-in LCD controller functionality\u003c\/li\u003e\n\u003cli\u003eSPI Serial Interface: Requires only three signal lines (SCK, SDI, CS) reducing microcontroller pin usage and enabling long-distance communication through twisted-pair cabling\u003c\/li\u003e\n\u003cli\u003eGreen Monochrome Display: Superior contrast and visibility compared to blue backlights with reduced eye fatigue during extended monitoring applications\u003c\/li\u003e\n\u003cli\u003eSingle 5V Supply: Simplifies power distribution in embedded systems without requiring multiple voltage rails or complex power management circuits\u003c\/li\u003e\n\u003cli\u003eWide Viewing Angle: 160-degree horizontal and vertical viewing angles ensure consistent image quality across multiple observer positions\u003c\/li\u003e\n\u003cli\u003eLow Power Consumption: Typical current draw of 100-150mA enables operation from USB ports or compact battery systems\u003c\/li\u003e\n\u003cli\u003eCompact Form Factor: 93mm x 70mm module size fits within space-constrained enclosures for portable and handheld instruments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications and Use Cases\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIndustrial Data Logging Systems: Display real-time sensor readings, temperature trends, and alarm conditions in manufacturing environments where graphical representation of multiple parameters is essential for operator decision-making\u003c\/li\u003e\n\u003cli\u003eEmbedded IoT Devices: Serve as local display interface for smart home controllers, environmental monitors, and wireless sensor nodes requiring visual feedback without internet connectivity\u003c\/li\u003e\n\u003cli\u003ePortable Medical Instruments: Provide graphical waveform display in portable ECG monitors, pulse oximeters, and portable ultrasound devices where compact size and low power consumption are critical\u003c\/li\u003e\n\u003cli\u003eAutomotive Diagnostic Tools: Display engine parameters, fault codes, and diagnostic graphs in OBD-II scanners and automotive test equipment requiring detailed technical information visualization\u003c\/li\u003e\n\u003cli\u003eLaboratory Test Equipment: Enable oscilloscope-like waveform display in portable signal generators, function generators, and spectrum analyzers for field testing and troubleshooting\u003c\/li\u003e\n\u003cli\u003eHome Automation Panels: Serve as local control interface for smart home hubs displaying temperature, humidity, security status, and energy consumption metrics\u003c\/li\u003e\n\u003cli\u003eEducational Robotics Projects: Provide visual feedback in robot control systems, autonomous vehicles, and educational microcontroller platforms for real-time sensor monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\n\u003cp\u003eTo integrate the 128x64 ST7920 Graphics LCD Display with your microcontroller project, establish the SPI communication by connecting the module's SCK pin to your microcontroller's SPI clock output, SDI pin to the MOSI (Master Out Slave In) line, and CS pin to any available GPIO configured as digital output. The module requires a stable 5V power supply connected to the VCC and GND pins with a 100nF ceramic capacitor placed as close as possible to the module for power supply decoupling. Initialize the SPI bus at a frequency between 1MHz and 10MHz, then send the initialization sequence to configure the display mode, contrast level, and backlight intensity according to the ST7920 datasheet specifications.\u003c\/p\u003e\n\n\u003cp\u003eAfter initialization, you can render graphics by calculating the byte address corresponding to each pixel location within the 128x64 matrix and transmitting the appropriate data bytes through the SPI interface. Most projects utilize existing ST7920 libraries available for Arduino (u8g2 library), Python (Adafruit libraries), and other platforms which handle the low-level SPI communication and provide high-level functions for drawing text, lines, circles, and bitmaps. The display memory is organized as 8 vertical pages of 128 bytes each, where each byte represents 8 vertical pixels, requiring careful bit manipulation when updating individual pixels. Implement proper timing delays between SPI transactions as specified in the datasheet, typically 1-2 microseconds minimum, to ensure reliable communication and prevent data corruption during high-speed operations.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between ST7920 SPI and parallel interface versions?\u003c\/summary\u003e\n\u003cp\u003eThe ST7920 controller supports both 8-bit parallel and 3-wire SPI communication modes. The SPI version (this product) uses only three signal lines (SCK, SDI, CS) reducing microcontroller pin requirements and enabling communication over longer distances with better noise immunity. The parallel version requires 8 data lines plus control signals, consuming more GPIO pins but offering faster data transfer rates. For most hobbyist and educational projects, the SPI version provides superior flexibility and simplicity.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this display with 3.3V microcontrollers like Arduino Due or ESP32?\u003c\/summary\u003e\n\u003cp\u003eThe ST7920 module is rated for 5V operation. While the SPI interface may tolerate 3.3V logic levels due to TTL compatibility margins, the backlight LED and LCD driver IC require the full 5V supply for proper operation. For reliable integration with 3.3V systems, use a logic level converter on the SPI signal lines and provide a separate 5V power supply for the module. Alternatively, many developers successfully operate this display at 5V while connecting SPI lines directly to 3.3V microcontrollers without level conversion, though this is not officially recommended.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I control the backlight brightness on this display?\u003c\/summary\u003e\n\u003cp\u003eThe standard ST7920 module includes an LED backlight controlled through the BLA (backlight anode) and BLK (backlight cathode) pins. Brightness is adjusted by controlling the current flowing through the LED using a current-limiting resistor or PWM signal. Connect the BLA pin through a 100-470 ohm current-limiting resistor to your 5V supply, and connect BLK to ground. For variable brightness, insert a PWM-capable GPIO pin or potentiometer between the resistor and 5V supply to modulate the backlight intensity without affecting the LCD display operation.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat contrast settings should I use for optimal display visibility?\u003c\/summary\u003e\n\u003cp\u003eThe ST7920 provides software-controllable contrast adjustment through register commands sent via SPI. Optimal contrast typically ranges from 0x80 to 0xC0 (128 to 192 in decimal) depending on viewing angle, ambient lighting, and personal preference. Start with 0xA0 (160) and adjust upward if text appears dim or downward if the display shows excessive ghosting. The contrast command requires sending specific instruction bytes followed by the contrast value byte. Refer to the ST7920 datasheet for the exact instruction format, or use pre-built libraries that abstract this complexity.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eOrders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return and warranty policy?\u003c\/summary\u003e\n\u003cp\u003eWe offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eWhy Buy from The Engineer Store\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Products: Sourced directly from authorized distributors with authentication\u003c\/li\u003e\n\u003cli\u003eExpert Team: Our technical team validates every product before listing\u003c\/li\u003e\n\u003cli\u003eFast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse\u003c\/li\u003e\n\u003cli\u003ePan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata\u003c\/li\u003e\n\u003cli\u003ePayment Options: COD, UPI, credit\/debit cards, net banking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBuy 128x64 ST7920 Graphics LCD Display Green SPI Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003e128x64 ST7920 Graphics LCD Display Green SPI\u003c\/strong\u003e online at \u003ca href=\"https:\/\/theengineerstore.in\"\u003eThe Engineer Store\u003c\/a\u003e, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.\u003c\/p\u003e\n\u003cp\u003eOur team in Bengaluru is available 24\/7 to support your journey from product selection to project completion.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":43774886707363,"sku":"TES-EV8103635","price":1048.23,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/products\/probotslcddisplay.jpg?v=1701090546","url":"https:\/\/www.theengineerstore.in\/zh-hans\/products\/128x64-st7920-graphics-lcd-display-green-spi","provider":"The Engineer Store","version":"1.0","type":"link"}