The G121SN01 V4 from AUO is a 12.1-inch a-Si TFT-LCD industrial display panel. It integrates the display driver, power circuit, and LED backlight system. It is widely used in industrial control, human-machine interface (HMI), and embedded devices. The panel supports SVGA (800×600) resolution and works with 16.2M colors or 262K colors, offering clear images and good system compatibility.
The G121SN01 V4 uses an LVDS interface and is backward compatible with G121SN01 V3, making system upgrade and replacement easier. The LED backlight driver board is built in, and the LED unit is replaceable. This helps extend product life and reduce maintenance cost. The panel is also RoHS compliant, meeting basic environmental requirements for industrial electronics.
This article focuses on the key specifications, features, and application scenarios of the G121SN01 V4. It aims to help engineers and buyers make better selection decisions. As a professional supplier of electronic components and industrial display solutions, Ande Electronics provides stable supply of the G121SN01 V4 and related products, supporting long-term industrial system upgrades.
G121SN01 V4 Key Specs
In this section, we focus on the key specifications of the G121SN01 V4, including screen size and resolution, display performance, interface type, and backlight features. These core specs directly affect the panel’s compatibility, stability, and service life in industrial equipment.
Parameter | Value |
Brand | |
Model | G121SN01 V4 |
Size | 12.1" |
Composition | LCM |
Resolution | 800(RGB)×600, SVGA 82PPI |
Luminance | 450 cd/m² (Typ.) |
Contrast Ratio | 700:1 (Typ.) (TM) |
Viewangle | 80/80/65/75 |
Color Depth | 262K/16.2M 55% NTSC |
Light Source | 9S2P WLED , 50K hours , With LED Driver |
Interface Type | LVDS (1 ch, 6/8-bit) , 20 pins Connector |
Pixel Format | RGB Vertical Stripe |
Active Area | 249.05(W)×188.3(H) mm |
Frame Rate | 60Hz |
Touchscreen | Without |
Voltage Supply | 3.3V (Typ.) |
Weight | 580g (Max.) |
Outline Size | 279(W)×209(H) mm |
Max Ratings | Operating Temperature: -30 ~ 85 °C ; Storage Temperature: -30 ~ 85 °C |
Learn more details: G121SN01 V4 Datasheet PDF
G121SN01 V4 Interface Signal Description
Next, we will introduce the interface signal definitions and descriptions of the G121SN01 V4, including the functions of LVDS signal pins, power pins, and control signals.
1 VDD: Power Supply, 3.3V (typical)
2 VDD: Power Supply, 3.3V (typical)
3 GND: Ground
4 SEL68: 6/ 8bits LVDS data input selection [H: 8bits L/NC: 6bit]
5 RIN0-: LVDS receiver signal channel 0
6 RIN0+: LVDS Differential Data Input (R0, R1, R2, R3, R4, R5, G0)
7 GND: Ground
8 RIN1-: LVDS receiver signal channel 1
9 RIN1+: LVDS Differential Data Input (G1, G2, G3, G4, G5, B0, B1)
10 GND: Ground
11 RIN2-: LVDS receiver signal channel 2
12 RIN2+: LVDS Differential Data Input (B2, B3, B4, B5, HS, VS, DE)
13 GND: Ground
14 CLKIN15: CLKIN+ LVDS receiver signal clock
16 GND: Ground
17 RIN3-: LVDS receiver signal channel 3, NC for 6 bit LVDS Input
18 RIN3+: LVDS Differential Data Input (R6, R7, G6, G7, B6, B7, RSV)
19 RSV: Reverse Scan Function [H: Enable; L/NC: Disable]
20 NC/GND: Reserved for AUO internal test. Please treat it as NC
G121SN01 V4 Highlights
After reviewing the basic information and specifications of the G121SN01 V4 LCD, we will provide a detailed overview of its key advantages, listed as follows:
Integrated WLED Backlight System
It has built-in LED driver, no extra backlight module required.
Wide Temperature Design
Operating temperature range of -30 to 85°C and storage temperature range of -30 to 85°C, suitable for industrial environments.
Long Lifespan and Maintainability
LED backlight lifespan ≥ 50,000 hours, LED units are replaceable to extend device service life.
High Reliability
Maximum vibration level of 1.5G (14.7 m/s²), ideal for long-term industrial use.
Display Features
It supports 6/8-bit color depth, wide viewing angle, and 180° reverse view design, suitable for different installation directions.
Mature for Mass Production
The stable design supports large-scale industrial deployment.
G121SN01 V4 Functional Block Diagram
The following diagram shows the functional block of the 12.1 inch color TFT/LCD module:
The functional block diagram of the G121SN01 V4 shows how each part of the LCD module works and how signals flow. The 12.1-inch TFT-LCD panel is the main display unit with a resolution of 800×600 pixels. The panel receives driving signals from the TCON (Timing Controller) through the Gate Driver and Source Driver to scan pixels and adjust brightness. The Source Driver outputs voltage for each column of pixels, while the Gate Driver controls the timing for each row. The Gamma circuit adjusts colors for accurate display.
The Power Block provides multiple voltages, including AVDD, VGH, and VGL, to supply stable power to the panel and drivers. The LED Driver controls the backlight system, including on/off and dimming functions, to ensure uniform brightness. The module connects to external signals via the LVDS interface, transmitting digital signals while keeping the panel and backlight working in sync.
G121SN01 V4 Application Areas
The G121SN01 V4 LCD is widely used in various industrial and medical applications. It delivers clear and reliable visual performance, meeting the demands of different environments.
1. Industrial Control Systems
This is the main application area of the G121SN01 V4. In factories, it is often used as an HMI (Human-Machine Interface) in control cabinets. It shows complex equipment data, process diagrams, and operation buttons.
l Assembly line control panels
l CNC machine displays
2. Medical Devices
The medical field requires high image clarity and long-term supply stability. G121SN01 V4 can display accurate images and numerical data. It is used to show patient vital signs or biochemical test results.
l Bedside monitors
l Ultrasound machines
l ECG machines
3. Embedded Systems
The G121SN01 V4 LCD supports multiple interfaces and driving modes. It is easy to integrate with different processors and control systems, improving overall performance and user experience in embedded devices.
l Smart meters
l Portable analyzers
l Industrial handheld terminals
4. Commercial Display Terminals
G121SN01 V4 is widely used in indoor self-service kiosks. It provides intuitive graphical interfaces and can run 24/7, reducing maintenance costs.
l Self-service machines
l POS terminals
l Information kiosks
5. Energy & Power Monitoring
In power distribution stations or renewable energy monitoring centers (like wind or solar), it shows real-time grid load and equipment status. G121SN01 V4 is suitable for these applications as well.
l Relay protection testers
l Inverter monitoring displays
Operating Precautions
1. Avoid scratching the front polarizer.
2. Power off before connecting or disconnecting.
3. Remove water drops immediately.
4. Clean with soft cloth or cotton only.
5. Glass panel may crack if dropped or hit.
6. Ground yourself to prevent ESD damage.
7. Do not open or modify the module.
8. Do not press the rear reflector sheet.
9. When repacking, press LED bar ends only.
10. Do not tilt or rotate signal connectors.
11. Do not twist or bend the TFT-LCD module.
12. Use a limited power source (IEC60950 / UL1950).
13. Extreme temperatures affect display performance.
14. Low-temperature operation shortens lamp life.
15. Specifications apply in landscape mode only.
16. Avoid static images; use screen saver or content shift.
ANDE Electronics: Reliable LCD Display Solutions
In conclusion, the G121SN01 V4 LCD, with its high resolution and versatile compatibility, has been widely applied in industrial control panels, medical devices, embedded systems, commercial display terminals, and energy monitoring equipment. It delivers clear, reliable, and efficient visual performance across a variety of professional and embedded applications.
As a professional display supplier, Ande Electronics is committed to providing high-quality LCD modules, dependable technical support, and flexible sourcing solutions. Whether you are upgrading existing systems or designing new industrial, medical, or embedded applications, we offer trusted and efficient display modules to help engineers and manufacturers achieve excellent visual clarity and enhanced system reliability.
