Product Subtitle / Keywords:
2.2 Inch Display, 240(RGB)×320 Resolution, Transmissive a-Si TFT-LCD, 8080/RGB/SPI Interface, COG+FPC+B/L, 262K Colors, 45-Pin, ST7773 Driver, 40.3×54.36×2.61 mm, 350:1 Contrast Ratio, 20ms Response Time, TN Viewing Direction, -20°C~70°C Operating Temperature

1. Executive Summary & Product Positioning

The LS022T03-MR-V1, developed by Lixin (Wan'an) Intelligent Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a 2.2-inch transmissive amorphous Silicon TFT-LCD (a-Si TFT-LCD) module.

This product specification (Revision 1.0, Module Type: COG+FPC+B/L) serves as the definitive technical document, defining its structural composition (COG+FPC+B/L), physical features, mechanical dimensions, absolute maximum ratings, detailed electrical characteristics, complete 8080/RGB/SPI interface pinout and timing, and comprehensive electro-optical performance. It delivers a resolution of 240(RGB)×320 with 262K-color display capability, driven by the ST7773 controller.

The document provides the core parameters necessary for system integration into compact embedded display applications. The unequivocal recommendation for engineers is to strictly adhere to the electrical specifications, interface timing, and mechanical tolerances described herein to ensure reliable performance and compatibility.

2. Detailed Product Overview & Architecture

• Core Technology: Transmissive-type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display).
• Display Mode: Active matrix TFT, Transmissive type.
• Display Format: Graphic 240(RGB)×320 Dot-matrix.
• Display Characteristics: Capable of displaying up to 262 thousand colors.
• Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight Unit). Composed of a TFT-LCD panel, a driver circuit, and a backlight unit.
• Input Data: 8080/RGB/SPI.
• Viewing Direction (Grayscale Inversion): TN (6 o'clock).
• Drive IC: ST7773.
• Connector Pin Count: 45-Pin.
• Approval Status: ☑ Approved Product Specification only (as per signature block).

3. Exhaustive Technical Specifications

3.1 Mechanical & Physical Specifications

Critical Mechanical Design Notes (from outline dimension drawing):

1. Display Type: Main LCD: Transmissive, TN.
2. Resolution: 240RGB320.
3. Viewing Direction: 6 O'CLOCK.
4. Operating Temperature: -20°C ~ 70°C.
5. Storage Temperature: -30°C ~ 80°C.
6. Backlight: 4 Chip-White LED Parallel.
7. Drive IC: ST7773.
8. ROHS Compliance: Yes.
9. General Tolerance: ±0.20 mm.
10. Angular Tolerance: ∠ ±1/4°.
11. Enclosure Design Notes:
    • It is recommended that the housing visible area be 0.3mm smaller per side than the VAmds.
    • The housing foam window should be 0.6mm larger per side than the VAmds.
    • The TP edge cannot contact metal conductors.
12. FPC Total Thickness: FPC+PI补强总厚=0.3±0.03mm.
13. Backlight Thickness: LCM 2.2±0.2mm.
14. Polarizer Thickness: POL 0.15mm.
15. Silver Paste Points: Present on the module.
16. Yellow Insulation Paper: Included for handling during assembly.
17. Release Tape/Sticker: Included (易撕贴).
18. Alignment Mark: White alignment line (白色对位线).
19. Backlight Circuit: IF=80mA, Vf=3.1V(TYP).
20. Connector: 0.5*44=22±0.05mm pitch.

3.2 Electrical & Interface Specifications

3.2.1 Absolute Maximum Ratings

Notes (interpreted):

• Note1/Note2: Stress beyond these ratings may cause permanent damage; functional operation is not implied under these conditions.

3.2.2 Electrical Characteristics (DC – Recommended Operating Conditions)

3.2.3 Pin Description (45-pin FPC)

Interface Summary:

• Multi-Interface Support: The module supports 8080/RGB/SPI interfaces, selectable via the IM2 pin.
• Backlight: Dedicated LEDA (Anode, Pin 36) and LEDK (Cathode, Pins 37-40) pins.
• Power: VCI (Pin 2) for main logic, IOVCC (Pin 3) for I/O interface, GND (Pins 1, 45) for ground.

3.2.4 Backlight Unit

Backlight Circuit Diagram (from document):

LEDA → [Backlight Circuit] → LEDK
IF = 80mA
VF = 3.1V (TYP)

3.3 Optical & Electro-Optical Characteristics (Ta=25°C)

Notes (from document):

Note 1: Definition of Response Time
The response time is defined as the LCD optical switching time interval between "White" state and "Black" state. Rise time (TON) is the time between photo detector output intensity changed from 90% to 10%. And fall time (TOFF) is the time between photo detector output intensity changed from 10% to 90%.

Note 2: Definition of Contrast Ratio
Contrast ratio (CR) is defined mathematically by the following formula:
Contrast Ratio = Luminance measured when LCD on the "White" state / Luminance measured when LCD on the "Black" state

Note 3: Definition of Viewing Angle
Viewing angle is the angle at which the contrast ratio is greater than 10. Angles are determined for the horizontal or x axis and the vertical or y axis with respect to the z axis which is normal to the LCD surface.

3.4 Version Record

(Not explicitly provided in the extracted document excerpt; refer to Section 10 of the full specification.)

4. Application Guidelines & Critical Notes

Intended Use

• Industrial control panels
• IoT display nodes
• Miniature handheld instruments
• Any application requiring a compact display with multiple interface options

Critical Design Considerations

1. Multi-Interface Support (8080/RGB/SPI):

   • This module supports three interface modes: 8080 (MCU parallel), RGB, and SPI.
   • The interface mode is selected via the IM2 pin (Pin 4).
   • The host MCU must support the selected interface mode.

2. Power Supply:

   • Provide stable VCI (2.4V to 3.3V, 2.8V typical) for the main logic (connected to Pin 2).
   • Provide stable IOVCC (1.65V to 3.3V, 1.8V typical) for the I/O interface (connected to Pin 3).
   • The backlight requires a constant-current LED driver connected to LEDA (Anode, Pin 36) and LEDK (Cathode, Pins 37-40), set to 80 mA at approximately 3.1V (TYP).

3. Interface Selection (IM2 Pin):

   • The IM2 pin (Pin 4) is used to select the interface mode.
   • The document provides a table showing the interface mode selection based on IM3, IM2, IM1, and IM0 pins.
   • Ensure the correct interface mode is selected and configured in the system design.

4. Mechanical Integration:

   • Module Outline: 40.3mm (H) × 54.36mm (V) × 2.61mm (D).
   • Active Area: 33.84mm × 45.12mm.
   • FPC: The module uses a 45-pin FPC with 0.5mm pitch (0.5*44=22±0.05mm total width).
   • Enclosure Design: The document provides specific recommendations for enclosure window openings relative to the LCD AA (Active Area):
     • Housing visible area: 0.3mm smaller per side than VAmds.
     • Housing foam window: 0.6mm larger per side than VAmds.
     • TP edge cannot contact metal conductors.

5. Viewing Angle Characteristics:
   This is a TN panel with a viewing direction of 6 o'clock:

   • Top (12 o'clock): 50° (Typ)
   • Bottom (6 o'clock): 20° (Typ)
   • Left (9 o'clock): 45° (Typ)
   • Right (3 o'clock): 45° (Typ)

   The module provides adequate viewing angles for standard applications, with the best viewing direction at 6 o'clock.

6. Optical Performance:

   • Response Time: 20ms (Typ), 30ms (Max) – fast enough for most GUI applications.
   • Contrast Ratio: 250 (Min), 350 (Typ) – adequate for indoor use.
   • Transmittance: 5.5% (Min), 6.0% (Typ).
   • White Chromaticity (CIE1931): Wx = 0.303, Wy = 0.359 (Typical).

7. Temperature Limits:

   • Operating Temperature: -20°C to +70°C.
   • Storage Temperature: -30°C to +80°C.

Handling & Compliance

• The module is ROHS compliant.
• Observe standard ESD precautions during handling and assembly.
• The module contains fragile glass and a 45-pin FPC – handle with care.
• Avoid bending the FPC sharply, especially near the connector interface.
• The module has a total thickness of 2.61mm – be careful when handling to avoid flexing.
• The module includes a yellow insulation paper and release tape/sticker for handling during assembly.

5. Conclusion & Design-In Support

The LS022T03-MR-V1 specification details a versatile 2.2-inch display module with multi-interface support (8080/RGB/SPI) and ST7773 driver — an excellent choice for applications requiring interface flexibility and standard resolution.

Key Strengths:

1. Multi-Interface Support: The module supports 8080, RGB, and SPI interfaces, providing maximum flexibility for different system architectures.

2. Standard Resolution (240x320): Suitable for simple icons, text, and basic UIs.

3. Fast Response Time: 20ms (Typ) – suitable for most GUI applications.

4. High Transmittance: 6.0% (Typ) – allows for efficient backlight usage.

5. Wide Operating Temperature Range: -20°C to +70°C for operation and -30°C to +80°C for storage.

6. Standard 45-pin FPC: The 0.5mm pitch 45-pin FPC provides a robust connection interface.

Main Design Focus:

• The critical design task is selecting and properly implementing the correct interface mode (8080, RGB, or SPI) based on the host system's capabilities.
• Supporting requirements:
  • Provide stable VCI (2.8V typical) and IOVCC (1.8V typical) power.
  • Provide a constant-current backlight driver set to 80 mA at 3.1V (TYP).
  • Mechanical integration — the module outline is 40.3mm × 54.36mm × 2.61mm.
  • FPC connector — verify the 45-pin FPC with 0.5mm pitch.
  • Interface selection — ensure the correct interface mode is selected via the IM2 pin.

This module is an excellent choice for designs requiring a standard 2.2-inch display with flexible interface options, such as industrial control panels, IoT devices, and miniature instruments.