Product Subtitle / Keywords:
4.96 Inch Display, 480(RGB)×854 Resolution, Transmissive a-Si TFT AHVA Mode, RGB (DPI) Interface, COG+FPC+B/L+LENS, 16.7M Colors, ST7102-G5 Driver IC, 40-pin FPC, 320 cd/m² Brightness (Typ with CG), 1000:1 Contrast Ratio (Min), 80° Viewing Angle (Free), -20°C~60°C Operating Temperature, 12-Chip White LED Backlight (6S2P)

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1. Executive Summary & Product Positioning

The LSL050I28-R-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 4.96-inch transmissive amorphous Silicon TFT-LCD module featuring AHVA (Advanced Hyper-Viewing Angle) Mode — an IPS-like technology for wide viewing angles.

This product specification (Revision 1.0, dated 2026-03-10, Module Type: COG+FPC+B/L+LENS) serves as the definitive technical document, defining its structural composition (COG+FPC+B/L+LENS), mechanical dimensions, absolute maximum ratings, detailed electrical characteristics, complete RGB (DPI) interface pinout and timing, and comprehensive electro-optical performance. It delivers an HD+ resolution of 480(RGB)×854 with 16.7M-color (24-bit true color) display capability, driven by the ST7102-G5 controller and manufactured by CSOT (华星) LCD panel.

The document provides the complete technical basis for system integration. The unequivocal recommendation for engineers is to strictly adhere to the electrical specifications, interface timing, mechanical tolerances, and environmental limits described herein to ensure reliable operation and optimal display quality.

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2. Detailed Product Overview & Architecture

• Core Technology: Transmissive-type a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) with AHVA (Advanced Hyper-Viewing Angle) Mode – a proprietary wide-viewing-angle technology comparable to IPS.
• Display Mode: AHVA Mode, 16.7M Color LCD, Transmissive, Normally Black.
• Display Characteristics: Capable of displaying up to 16.7 million colors (24-bit true color).
• Module Construction: COG (Chip-On-Glass) + FPC (Flexible Printed Circuit) + B/L (Backlight Unit) + LENS (Cover Glass). Composed of a TFT-LCD panel, a driver circuit, a backlight unit, and a cover glass with AF (Anti-Fingerprint) coating.
• LCD Panel Source: CSOT (华星光电).
• Driver IC: ST7102-G5.
• Interface: RGB (DPI/DE Mode) – 24-bit parallel RGB interface with 6 bits per color (R[5:0], G[5:0], B[5:0]).
• Viewing Direction: Free 80/80/80/80 (typ) – symmetrical wide viewing angles in all directions (AHVA/IPS technology).
• Backlight Configuration: 12 Chip-White LEDs arranged in 6 series × 2 parallel (6S2P) configuration.
• Cover Glass (LENS): 1.1mm thick, Asahi glass material, with AF coating (喷涂) — anti-fingerprint coating.
• CG Key Parameters: CS ≥ 500Mpa, DOL ≥ 10um, CT < 15um, surface hardness ≥ 7H (750g), glass transmittance ≥ 90%, haze ≤ 2%.
• ROHS Compliance: Product meets ROHS 2.0 standards.
• Approval Status: ☑ Approved Product Specification only (as per signature block).

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3. Exhaustive Technical Specifications

3.1 Mechanical & Physical Specifications

Critical Mechanical Notes (from Outline Dimension drawing):

1. Display Mode: TFT AHVA Mode, 16.7M Color LCD, Transmissive, Normally Black.
2. Viewing Direction: Free 80/80/80/80 (typ) — symmetrical 80° viewing angles in all directions.
3. Backlight: 12 Chip-White LEDs (6S2P configuration).
4. Operating Temperature: -20°C TO 60°C.
5. Storage Temperature: -30°C TO 80°C.
6. Surface Finish: Front side with AF coating (喷涂) — anti-fingerprint coating.
   • Water contact angle before wiping: ≥ 110°.
   • After 2500 wipes with 0000# steel wool at 1KG/CM pressure: water contact angle ≥ 100°.
7. CG (Cover Glass) Parameters:
   • Glass material: 1.1mm Asahi glass, with AF coating.
   • CS (Compressive Stress): ≥ 500Mpa.
   • DOL (Depth of Layer): ≥ 10um.
   • CT (Central Tension): < 15um.
   • Surface hardness: ≥ 7H (750g).
   • Glass transmittance: ≥ 90%.
   • Haze: ≤ 2%.
8. Ink Optical Density (OD Value): Black ink OD ≥ 5.0.
9. Ink Surface Energy (Lens ink area): ≥ 32 dyne (Arcotest Dyne test pen, 3S contraction less than 10%).
10. Ink Adhesion: Cross-cut test (百格) in screen printing area (excluding mirror silver) using 3M/610 tape — peeling at intersections ≤ 5%.
11. Ink Insulation Impedance: ≥ 1000MΩ (using 500V DC megger, measure at 10mm intervals).
12. Steel Ball Drop Impact Test: 0.2J — cover glass appearance and mechanical function must remain normal after test.
13. Overall Flatness (总成平整度): ≤ 0.3mm.
14. Dimensions marked with * are critical dimensions; dimensions in () are reference dimensions.
15. General Tolerance: Unmarked tolerances: ±0.15mm for x.x; ±0.20mm for x.xx.
16. Angular Tolerance: ∠ ±1/4°.
17. ROHS Compliance: Product meets ROHS 2.0.
18. Product Software ID: Read ID value = 0xDA (0x80 register).
19. TP FPC: Includes touch panel FPC connection (喷码区域 — inkjet marking area).
20. FPC Bend: The module FPC has a specified bend configuration for shipping (FPC弯折固定出货).

3.2 Electrical & Interface Specifications

3.2.1 Absolute Maximum Ratings

(Not explicitly provided in the document excerpt; refer to Section 5 of the full specification.)

3.2.2 Electrical Characteristics (DC – Recommended Operating Conditions)

Critical Power Note: IOVCC can be 1.8V or 3.3V (the table shows 1.8V Typ but range is 1.8-3.3V). VCC is fixed at 3.3V (Typ) with no Min/Max range specified. The VIH/VIL thresholds are referenced to IOVCC.

3.2.3 Pin Description (40-pin FPC)

Interface Summary:

• RGB (DPI) Interface: 24-bit parallel RGB bus (R[5:0], G[5:0], B[5:0]) with DE (Data Enable), PCLK (Pixel Clock), HS (Horizontal Sync), and VS (Vertical Sync) control signals.
• SPI Control Interface: Separate SPI bus (SDI, SDO, SCL, CS) for driver IC register configuration (commands).
• Backlight: Dedicated LEDA (Anode, Pin 2) and LEDK (Cathode, Pin 1) pins.
• Power Pins: VCC3.3V (Pin 4), IOVCC3.3V (Pin 5), and multiple GND pins (Pins 3, 6, 12-14, 21-22, 29-30).
• Reset: Dedicated RESET pin (Pin 11).

3.2.4 SPI Interface Timing Characteristics (SPI9 & SPI16)

Conditions: IOVCC=1.8V, Ta=25°C.

A. Write Operation Timing:

B. Read Operation Timing:

Important Note: All SPI timing parameters are marked as "TBD" (To Be Determined) in this document revision. This indicates these values are pending final characterization by the manufacturer. Engineers should contact LESSON directly for confirmed timing values before finalizing their design.

3.2.5 Reset Timing Characteristics

Conditions: IOVCC=1.8V, Ta=25°C.

Reset Timing Notes:

1. During the reset period, the display will be blanked, then return to default condition for IC initialization.
2. Again, all timing values are marked as "TBD" — confirm with LESSON.

Reset Noise Rejection Diagram (Figure 82):

The document includes a Reset Noise Rejected Diagram showing:

• A short RESX pulse (shorter than the noise rejection threshold) is rejected by the internal circuitry.
• Only a RESX pulse longer than the specified minimum width (Trst_width) will trigger a proper reset.

3.2.6 Backlight Unit

Backlight Drive Notes:

• Use a boost-type constant-current LED driver set to 40 mA.
• The compliance voltage must support 16.8V to 19.2V (typical ~18V) across the 6-series LED chain.
• Two parallel branches share the 40mA total current (approximately 20mA per branch).
• Backlight Circuit Diagram (from document):
   

   

  K  → 1O  A
  K  → 2O  A
  (6×2=12 LEDs)
  Vf = 16.8V~19.2V (If=2×20mA=40mA)
  

3.2.7 Backlight Luminance (With Cover Glass)

• Luminance with CG: 250 cd/m² (min.), 320 cd/m² (typ.) at IF=40mA.
• Luminance Uniformity: 80% (Min).
• NTSC Color Gamut: 60% (Min).

3.3 Optical & Electro-Optical Characteristics

Notes (from document):

Note 1: Definition of viewing angle range

• Viewing angle is measured with the optical measurement system shown in Figure 4-2.
• The normal line is θ=Φ=0°.
• 12 o'clock direction corresponds to Φ=90°.
• 6 o'clock direction corresponds to Φ=270°.

Note 2: Definition of optical measurement system

• Optical characteristics must be measured in a dark room.
• After 30 minutes operation, the optical properties are measured at the center point of the LCD screen.
• Measurement distance: 500mm from the photo detector to the LCD surface.
• The angle between the photo detector and the normal line (θ) is 0° for center measurements.

Note 3: (Not explicitly defined in excerpt)

Note 4: Backlight circuit

• LED CIRCUIT DIAGRAM: 6×2=12 LEDs
• VF = 16.8V~19.2V (If = 2×20mA=40mA)

3.4 Color Chromaticity (CIE1931) – Specification Table

The document provides color chromaticity coordinates (center values) with the following tolerances:

Note: From the electro-optical table, the typical white point is Wx = 0.301, Wy = 0.329.

3.5 Version Record

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4. Application Guidelines & Critical Notes

Intended Use

• Smartphones and feature phones
• Portable multimedia devices and handheld terminals
• Industrial PDAs and mobile instruments
• IoT display panels with high color requirements
• Any application requiring an HD+ resolution display with AHVA/IPS wide viewing angles and a standard RGB interface with cover glass

Critical Design Considerations

1. RGB (DPI) Interface – CRITICAL:

   • This module uses a 24-bit parallel RGB (DPI) interface with 6 bits per color (R[5:0], G[5:0], B[5:0]).
   • Requires 18 data pins + 4 control pins (PCLK, HS, VS, DE) = 22 pins minimum from the host processor.
   • PCLK (Pin 38), HS (Pin 39), VS (Pin 40), and DE (Pin 37) are the sync and clock signals.
   • This module supports DE (Data Enable) mode — the host must provide a valid DE signal.
   • The host must also have an SPI interface (SDI, SDO, SCL, CS, RESET) for initializing the ST7102-G5 driver IC registers.
   • PCB Layout: Route the 18 data lines and 4 control signals with length matching to minimize skew. Keep traces as short as possible.

2. High-Voltage Backlight Driver – CRITICAL:

   • The backlight consists of 6 LEDs in series (6S2P), requiring a forward voltage of 16.8V to 19.2V at 40 mA total.
   • A boost-type constant-current LED driver is required to step up the system voltage (typically 3.3V-5V) to the required ~18V.
   • The total backlight power consumption is approximately 0.72W (18V × 40mA).
   • Connect LEDA (Pin 2, Anode) to the boost output (+) and LEDK (Pin 1, Cathode) to the current sink (−).

3. Power Supply Requirements:

   • VCC3.3V (Pin 4): 3.3V main logic supply.
   • IOVCC3.3V (Pin 5): 1.8V or 3.3V for I/O interface. The pin is labeled "3.3V" but the DC table shows 1.8V Typ (1.8-3.3V range).
   • Multiple GND pins: Pins 3, 6, 12-14, 21-22, 29-30 — connect all ground pins for proper signal integrity.
   • Power Sequencing: Follow the standard ST7102-G5 power sequence: IOVCC → VCC → RESET → Backlight.

4. SPI Interface for Command Configuration:

   • The module uses a separate SPI bus (SDI, SDO, SCL, CS) for writing to the ST7102-G5 driver IC registers.
   • Critical: All SPI timing parameters in this document are marked as "TBD". Contact LESSON for confirmed values.
   • The SPI bus is used for initialization commands (sleep out, display on, gamma settings, etc.) — not for image data.

5. Reset Circuit (Pin 11):

   • RESET is active low. Provide a GPIO-driven reset from the host processor.
   • Minimum reset pulse width: Trst_width (TBD) — assume at least 10µs as standard practice.
   • After releasing RESET, wait Trst_time (TBD) — assume at least 5ms as standard practice — before sending any commands.
   • The reset timing diagram (Figure 82) shows noise rejection — a short positive spike on RESX is rejected.

6. Cover Glass (LENS) Integration – CRITICAL:

   • The module includes a 1.1mm thick Asahi cover glass with AF (Anti-Fingerprint) coating.
   • AF Coating Care:
     • Water contact angle must be ≥ 110° before wear.
     • After 2500 wipes with 0000# steel wool at 1KG/CM pressure: water contact angle ≥ 100°.
   • Ink Specifications:
     • Black ink OD ≥ 5.0 (excellent opacity).
     • Ink surface energy ≥ 32 dyne.
     • Cross-cut test: ≤ 5% peeling in screen printing area.
     • Ink insulation impedance ≥ 1000MΩ.
   • Glass Strength:
     • CS ≥ 500Mpa, DOL ≥ 10um, CT < 15um.
     • Surface hardness ≥ 7H (750g).
     • Steel ball drop test: 0.2J — glass must remain intact.
   • Optical Quality:
     • Transmittance ≥ 90%.
     • Haze ≤ 2%.
   • Flatness: Overall module flatness ≤ 0.3mm.

7. Mechanical Integration:

   • Module Size: The outline drawing shows precise dimensions for the module. Key dimensions include:
     • Total module width: 61.18 ± 0.15mm (measured from drawing).
     • Other dimensions as per the outline drawing with * marked as critical.
   • The module uses a 40-pin FPC with 0.5mm pitch.
   • FPC Bend: The FPC is shipped in a specific bent configuration (FPC弯折固定出货) — verify the bend direction matches your mechanical design.
   • The module includes PI reinforcement on the FPC (PI补强).
   • Touch Panel FPC: There is a separate TP FPC (触控FPC) with a 24-pin connector (FPC24-S40FPA-005) — this module is designed to work with an external touch panel.
   • Conductive Fabric/Gasket: The module may include a conductive fabric or gasket for grounding (漏铜接地) — ensure proper grounding in your design.
   • The backlight has a noted protrusion area (背光灯线处高及出处请注意机壳避空) — provide mechanical clearance in the housing.

8. Temperature Limits:

   • Operating Temperature: -20°C to +60°C (note: only 60°C, lower than many other modules).
   • Storage Temperature: -30°C to +80°C.

9. Touch Panel Integration (External):

   • The module is designed to work with an external capacitive touch panel.
   • The TP FPC has separate connectors and pins (see outline drawing).
   • Ensure the TP FPC is properly connected and the touch controller is initialized via its own I²C or SPI interface.

10. Product Software ID:

    • The document specifies: value=0x80 产品烧录软件ID要求read 0xDA.
    • This means the driver IC should return ID = 0xDA when reading register 0x80.
    • Use this ID for product identification in software.

Handling & Compliance

• The module is ROHS 2.0 compliant.
• Observe standard ESD precautions during handling and assembly.
• The module contains fragile glass (cover glass + LCD panel) and two FPCs (main 40-pin FPC + TP FPC) – handle with care.
• Do NOT touch the AF coating surface — fingerprints may compromise the anti-fingerprint properties.
• The cover glass is chemically strengthened — avoid applying excessive point pressure.
• Avoid sharp bending of the FPCs, especially at the specified bend lines.
• The module includes a tear-off sticker (易撕贴) and yellow insulation paper (黄色绝缘胶纸) for handling during assembly.
• For optical measurements: measure in a dark room after 30 minutes of operation at the center point of the screen.

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5. Conclusion & Design-In Support

The LSL050I28-R-V1 specification details a premium 4.96-inch AHVA/IPS display module with a cover glass and standard RGB interface — an excellent choice for high-end portable and embedded display applications.

Key Strengths:

1. AHVA Technology (IPS-like): 80° symmetrical viewing angles in all directions ensure consistent image quality from any perspective.

2. High Resolution (480×854): HD+ resolution in a 4.96-inch form factor, providing excellent clarity for smartphones and handheld devices.

3. High Contrast Ratio (1200:1 Typ): Excellent image depth and readability.

4. Integrated Cover Glass with AF Coating: The module includes a 1.1mm Asahi cover glass with anti-fingerprint coating, eliminating the need for a separate touch panel lens in the final product design.

5. Comprehensive Mechanical Specifications: Detailed cover glass parameters (CS, DOL, CT, hardness, transmittance, haze, ink OD, adhesion, etc.) provide complete design guidance.

6. Standard RGB Interface: The 24-bit parallel RGB interface with DE mode is widely supported by application processors and FPGAs.

7. Robust Temperature Range: Designed for -20°C to +60°C operation and -30°C to +80°C storage.

8. Well-Defined Product ID: Software ID (0xDA at register 0x80) allows for product identification in manufacturing.

Main Design Focus:

1. One of the most critical design tasks is implementing a high-voltage (18V) constant-current LED backlight driver for the 6S2P LED configuration (40mA).

2. RGB Interface PCB Layout: Route the 18 data lines and 4 control signals with proper length matching. The PCLK, HS, VS, and DE signals require careful signal integrity management.

3. SPI Timing Confirmation: All SPI timing parameters are marked as "TBD" — must be confirmed with LESSON before finalizing the design.

4. Mechanical Integration: Design the housing to accommodate the 4.96-inch module with cover glass, 40-pin main FPC, and separate TP FPC. Ensure the backlight protrusion area is cleared.

5. Driver Software: Software engineers must implement:

   • Initialization sequence for ST7102-G5 via SPI commands.
   • RGB timing generation for 480×854 resolution at the correct frame rate.
   • Proper power sequencing and reset timing.
   • Product ID verification (read 0xDA from register 0x80).

6. Touch Panel Selection and Integration: The module is designed for use with an external touch panel — select a compatible touch sensor and controller, and integrate the TP FPC connection.

This module is an excellent choice for mid-to-high-end portable and embedded applications requiring a large, high-resolution display with wide AHVA/IPS viewing angles, a cover glass, and a standard RGB interface, such as high-end feature phones, industrial handhelds, and portable multimedia devices.

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Official Fixed English Name (Unified Across the Network and Permanently Used)
立信（万安）智显科技有限公司
Lixin (Wan'an) Intelligent Display Technology Co., Ltd.
深圳市智信微光电技术有限公司
Shenzhen Zhixinwei Photoelectricity Technology Co., Ltd.

Located in Jiangxi, Lixin (Wan'an) Intelligent Display Technology Co., Ltd. is an original manufacturing factory. It professionally produces small and medium-sized TFT color screens, LCD liquid crystal modules, industrial wide-temperature screens, vehicle displays, medical screens and integrated touch display products.
Its subsidiary, Shenzhen Zhixinwei Photoelectricity Technology Co., Ltd., focuses on solution customization, R&D, design and marketing. It realizes efficient collaboration between R&D and production, and provides reliable customized display products and stable delivery for customers in various industries.