Product Subtitle / Keywords:
2.01 Inch Display, 240(RGB)×296 Resolution, Transmissive a-Si TFT IPS, 4-Line SPI Interface, COG+FPC+B/L, 262K Colors, JD9853 Driver, 34.04×38.74×1.6 mm, 450 cd/m² Luminance, 1200:1 Contrast Ratio, 30ms Response Time, Free (IPS) Viewing Direction, -10°C~60°C Operating Temperature

1. Executive Summary & Product Positioning

The LS0201I07-S-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 2.01-inch transmissive amorphous Silicon TFT-LCD (a-Si TFT-LCD) module with IPS (In-Plane Switching) technology.

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 4-Line SPI (Serial Peripheral Interface) pinout and timing, and comprehensive electro-optical performance. It delivers a resolution of 240(RGB)×296 with 262K-color display capability, driven by the JD9853 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, IPS.
• Display Format: Graphic 240(RGB)×296 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: 4-line serial interface.
• Viewing Direction (Grayscale Inversion): Free (IPS) – wide viewing angle in all directions.
• Drive IC: JD9853.
• 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, IPS.
2. Viewing Direction: ALL VIEWING.
3. Operating Temperature: -10°C ~ 60°C.
4. Storage Temperature: -20°C ~ 70°C.
5. Main LCD Driver: JD9853.
6. Backlight: 4 Chip-White LED Parallel.
7. ROHS Compliance: Yes.
8. General Tolerance: ±0.20 mm.
9. Angular Tolerance: ∠ ±1/4°.
10. 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.
11. FPC Total Thickness: PI补强+FPC总厚=0.20 mm.
12. Backlight Thickness: H-BL 0.74±0.2 mm.
13. Polarizer Thickness: POL 0.15 mm.
14. Silver Paste Points: Present on the module.
15. Yellow Insulation Paper: Included for handling during assembly.
16. Release Tape/Sticker: Included (易撕贴).
17. Alignment Mark: White alignment line (白色对位线).
18. Backlight Circuit: IF=80mA, Vf=2.8~3.2V(TYP).

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 (15-pin FPC)

Interface Summary:

• 4-Line Serial Interface: Uses SCL (Serial Clock), SDA (Serial Data), RS (Data/Command), CS (Chip Select), and RESET (Reset) for communication.
• TE Pin (Pin 14): Tearing effect output — can be used for frame synchronization.
• Backlight: Dedicated LEDA (Anode, Pin 12) and LEDK (Cathode, Pin 13) pins.
• Power: VCI (Pins 10, 11) for power supply, GND (Pins 1, 15) for ground.
• Unused Pins: Pins 5, 6, 7 are NC — leave floating.

3.2.4 Serial Interface Timing Characteristics (4-line SPI)

Conditions: VDDI=1.65 to 3.3V, VDD=2.4 to 3.3V, AGND=DGND=0V, Ta=25°C.

A. Write Operation Timing:

B. Read Operation Timing:

C. Data Timing:

Key Timing Observations:

• Write timing is significantly faster than read timing: Write cycle (twc) is 16ns (62.5 MHz), while read cycle (trc) is 150ns (6.67 MHz).
• Data setup/hold time: tds = tdt = 7ns – very fast, requiring careful PCB layout.
• Chip select setup time: 15ns for write, 60ns for read.

3.2.5 Reset Input Timing

Reset Timing Notes (from document):

1. Spike due to an electrostatic discharge on RESX line does not cause irregular system reset. A pulse shorter than 5µs is rejected, a pulse longer than 9µs initiates a reset.
2. During the Resetting period, the display will be blanked (maximum 120ms when Reset Starts in Sleep Out mode).
3. Spike Rejection also applies during a valid reset pulse: less than 20ns width positive spike will be rejected.
4. When Reset applied during Sleep In Mode.
5. When Reset applied during Sleep Out Mode.
6. It is necessary to wait 5msec after releasing RESX before sending commands. Sleep Out command cannot be sent for 120msec.

3.2.6 Backlight Unit

Backlight Circuit Diagram (from document):

LEDA → [Backlight Circuit] → LEDK
IF = 80mA
VF = 2.8 ~ 3.2V (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 following figure and shall be measured by switching the input signal for "black" and "white". This definition is valid for a normally black display. For a normally white display the opposite definition applies.

• Tr (Rise Time): Time from 10% to 90% of optical response.
• Tf (Fall Time): Time from 90% to 10% of optical response.
• Tr + Tf = Total Response Time.

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.

Note 4: Backlight Circuit

• Drive condition: IF = 80mA, Vf = 2.8 ~ 3.2V (TYP)

3.4 Version Record

4. Application Guidelines & Critical Notes

Intended Use

• Smartwatches, fitness trackers, and other wearable devices
• IoT display nodes and smart home controls
• Miniature handheld instruments
• Any application requiring a compact display with excellent IPS viewing angles and high brightness

Critical Design Considerations

1. Interface (4-Line Serial SPI): This module uses a 4-line serial SPI interface for communication. The host MCU must have at least 5 GPIOs (SCL, SDA, RS, CS, RESET) to drive the display.

2. Power Supply:

   • Provide stable VCI (2.6V to 3.3V, 2.8V typical) for the main logic (connected to Pins 10, 11).
   • Provide stable IOVCC (1.65V to 3.3V, 2.8V typical) for the I/O interface.
   • The backlight requires a constant-current LED driver connected to LEDA (Anode, Pin 12) and LEDK (Cathode, Pin 13), set to 80 mA at approximately 2.8~3.2V.

3. Interface Timing Requirements:

   • For write operations, the serial clock cycle (twc) must be ≥ 16ns (62.5 MHz maximum). This is a very fast write speed requiring careful PCB layout.
   • For read operations, the serial clock cycle (trc) must be ≥ 150ns (6.67 MHz maximum).
   • Data setup time (tds) and data hold time (tdt) must be ≥ 7ns.
   • Address setup time (tas) and address hold time (tah) must be ≥ 10ns.

4. Reset Circuit:

   • The RESET pin (Pin 9) is active low.
   • It must be driven low for at least 10 µs during power-up for proper initialization.
   • A pulse shorter than 5 µs will be rejected.
   • After releasing RESET, wait 5 ms before sending any commands. Sleep Out command cannot be sent for 120 ms.
   • A simple RC circuit (10kΩ resistor to VCC, 1μF capacitor to GND) or an MCU GPIO is recommended.

5. TE (Tearing Effect) Pin (Pin 14):

   • The TE pin outputs the display's tearing effect signal.
   • This signal can be used to synchronize MCU frame writes with the display's internal refresh cycle, preventing screen tearing.
   • If not used, leave this pin open.

6. Mechanical Integration:

   • Module Outline: 34.04mm (H) × 38.74mm (V) × 1.6mm (D).
   • Active Area: 32.04mm × 39.49mm.
   • FPC: The module uses a 15-pin FPC.
   • 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.

7. Viewing Angle Characteristics:
   This is an IPS panel with excellent viewing angle performance (CR > 10):

   • Top (12 o'clock): 85° (Typ)
   • Bottom (6 o'clock): 85° (Typ)
   • Left (9 o'clock): 85° (Typ)
   • Right (3 o'clock): 85° (Typ)

   The module provides near-perfect viewing angles in all directions, making it ideal for wearable devices.

8. Optical Performance:

   • Response Time: 30ms (Typ), 35ms (Max) – fast enough for most GUI applications.
   • Contrast Ratio: 800 (Min), 1200 (Typ) – excellent contrast performance for an IPS panel.
   • Transmittance: 4.8% (Min), 5.33% (Typ).
   • White Chromaticity (CIE1931): Wx = 0.311, Wy = 0.334 (Typical).
   • Luminance (IF = 80mA): 450 cd/m² (Typ) – high brightness for good readability in various lighting conditions.

9. Temperature Limits:

   • Operating Temperature: -10°C to +60°C.
   • Storage Temperature: -20°C to +70°C.

Handling & Compliance

• The module is ROHS compliant.
• Observe standard ESD precautions during handling and assembly.
• The module contains fragile glass and a 15-pin FPC – handle with care.
• Avoid bending the FPC sharply, especially near the connector interface.
• The module has a total thickness of 1.6mm – 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 LS0201I07-S-V1 specification details a high-performance 2.01-inch IPS display module with a 4-line SPI interface and JD9853 driver — an excellent choice for wearable and compact display applications requiring high brightness, excellent image quality, and wide viewing angles.

Key Strengths:

1. High Brightness: 450 cd/m² (Typ) ensures excellent readability in indoor and outdoor conditions.

2. Excellent IPS Technology: 85° viewing angles in all directions ensure consistent image quality from any perspective — essential for wearable devices.

3. Excellent Contrast Ratio: 1200:1 (Typ) provides outstanding image quality for an IPS panel.

4. Standard 4-Line SPI Interface: Requires only 5 GPIOs for communication, simplifying integration.

5. Fast Write Speed: 16ns write cycle (62.5 MHz) allows for rapid screen updates.

6. TE (Tearing Effect) Support: The dedicated TE pin enables tear-free graphics synchronization.

7. Comprehensive Timing Documentation: Detailed serial interface timing parameters provided, including write and read timing characteristics.

8. High Transmittance: 5.33% (Typ) allows for efficient backlight usage.

Main Design Focus:

• The critical design task is properly implementing the serial interface timing, especially the 16ns write cycle requirement which demands careful PCB layout with short trace lengths.
• Supporting requirements:
  • Provide stable VCI (2.8V typical) and IOVCC (2.8V typical) power.
  • Provide a constant-current backlight driver set to 80 mA at 2.8~3.2V.
  • Mechanical integration — the module outline is 34.04mm × 38.74mm × 1.6mm.
  • FPC connector — verify the 15-pin FPC.
  • Enclosure design — follow the recommended window opening dimensions relative to the LCD AA.
  • Reset timing — ensure proper reset pulse width (≥10μs) and wait times (5ms after reset, 120ms after Sleep Out).

This module is an excellent choice for high-end wearable devices, smartwatches, and any compact IoT application requiring a high-brightness IPS display with excellent viewing angles and fast interface speed.