LS070T08-R-V1: 7.0-Inch a-Si TFT LCD Module, 1024×600 Resolution, 48-Pin, Driver IC COG, Transmissive, 6 O'Clock
Product Subtitle / Keywords
7.0 Inch Display, 1024(RGB)×600 Resolution, Transmissive a-Si TFT-LCD Module, 48-Pin Connector, COG+FPC+B/L, Viewing Direction: 6 O'Clock, Module Size (H×V×D): 164.9 × 100 × 3.25 mm, Active Area (H×V): 154.08 × 85.92 mm, VDD (Digital Power Supply): 3.0-3.6V Typ 3.3V, AVDD (Analog Power Supply): 8.5-8.9V Typ 8.7V, VGH (Gate On): 22-24V Typ 23V, VGL (Gate Off): -7.4 to -6.2V Typ -6.8V, VCOM (Common Voltage): 2.2-2.6V Typ 2.4V, DCLK Frequency: 45-57 MHz Typ 51.2 MHz, Luminance: 200-220 cd/m² Typ 220 cd/m², Contrast Ratio: 200 Typ, Response Time: 25 ms Typ, Viewing Angle: 70°(L/R) 40°(U), Backlight: White LED 18 Dices (3*6), IF=120mA, VF=9~10.5V, ROHS Compliant, Lesson Smart Display Technology Co., Ltd
1. Executive Summary & Product Positioning
The LS070T08-R-V1, developed by Lesson Smart Display Technology Co., Ltd. (立信(万安)智显科技有限公司), is a 7.0-inch transmissive a-Si TFT-LCD (amorphous silicon thin film transistor liquid crystal display) module.
This product specification (Revision 1.0, dated 2024-03-20) serves as the definitive technical document, defining its general description (including 1024(RGB)×600 resolution), physical features, mechanical specifications, outline dimensions, absolute maximum ratings, electrical characteristics (including all critical voltage rails), pin assignments, timing characteristics, and electro-optical characteristics.
The document provides the core parameters necessary for system integration into embedded display applications requiring a standard 7.0-inch display with a parallel RGB interface. 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) module, which is composed of a TFT-LCD panel, a driver circuit and a backlight unit.
- Display Type: Transmissive type.
- Display Format: Graphic 1024(RGB) × 600 pixel array.
- Module Construction: COG+FPC+B/L (Chip-On-Glass + Flexible Printed Circuit + Backlight).
- Module Size: 164.9 (H) × 100 (V) × 3.25 (D) mm.
- Active Area: 154.08 (H) × 85.92 (V) mm.
- Backlight: White LED, 18 dices (configuration: 3*6), IF=120mA, VF=9~10.5V.
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Module Model | LS070T08-R-V1 |
| LCD Size (Diagonal) | 7.0 inch |
| Resolution | 1024(RGB) × 600 pixels |
| Display Type | Transmissive a-Si TFT-LCD |
| Module Size (H×V×D) | 164.9 × 100 × 3.25 mm |
| Active Area (H×V) | 154.08 × 85.92 mm |
| Module Type | COG+FPC+B/L |
| PIN Count | 48 |
| Supplier | 立信(万安)智显科技有限公司 (Lesson Smart Dispaly Technology Co.,Ltd) |
| Document Revision / Date | 1.0 / 2024-03-20 |
3.2 Electrical & Interface Specifications
3.2.1 Pin Description (48-pin Connector)
The module uses a 48-pin interface with parallel RGB signals, power, and control. Key signals include:
| Pin No. | Symbol | I/O | Function |
|---|---|---|---|
| 39 | SHLR | I | Left or Right Display Control |
| 40 | UPDN | I | Up/Down Display Control |
| 41 | VDDG | P | Positive Power for TFT (Also referenced as VGH) |
| 42 | VEEG | P | Negative Power for TFT (Also referenced as VGL) |
| 43 | AVDD | P | Analog Power |
| 44 | RSTB | I | Global reset pin. Active low. Suggest connecting with an RC reset circuit (R=10KΩ, C=1μF). Normally pull high. |
| 45 | NC | - | Not connect |
| 46 | VCOM | I | Common Voltage |
| 47 | DITH | I | Dithering setting. DITH="H": 8bit resolution (last 2 bit of input data truncated). DITH="L": 6bit resolution (default setting). |
| 48 | GND | P | Power ground |
3.2.2 Absolute Maximum Ratings
| Item | Symbol | Min. | Max. | Unit |
|---|---|---|---|---|
| Digital Power Supply Voltage For LCD | VDD | 3.0 | 3.6 | V |
| Analog Power Supply Voltage | AVDD | 8.5 | 8.9 | V |
| TFT Gate on voltage | VGH | 22 | 24 | V |
| TFT Gate off voltage | VGL | -7.4 | -6.2 | V |
| Common Voltage | VCOM | 2.2 | 2.6 | V |
3.2.3 Timing Characteristics (DE Mode)
| ITEM | SYMBOL | MIN. | TYP. | MAX. | UNIT |
|---|---|---|---|---|---|
| Dot Clock | 1/tCLK | 45 | 51.2 | 57 | MHz |
| Horizontal Total Time | tH | 1324 | 1344 | 1364 | tCLK |
| Horizontal Effective Time | tHA | 1024 | 1024 | 1024 | tCLK |
| Horizontal Blank Time | tHB | 300 | 320 | 340 | tCLK |
| Vertical Total Time | tV | 625 | 635 | 645 | tH |
| Vertical Effective Time | tVA | 600 | 600 | 600 | tH |
| Vertical Blank Time | tVB | 25 | 35 | 45 | tH |
3.2.4 Power ON/OFF Sequence
Power On: DVDD → AVDD/VGL → VGH → Video & Logic Signal → Backlight
Power Off: Backlight → Video & Logic Signal → VGH → AVDD/VGL → DVDD
Critical timing constraints: 0 < T1 ≤ 10ms, T2 > 0ms, T3 > 20ms, T12 ≥ 200ms, T13 ≥ 200ms.
3.3 Electro-Optical Characteristics
| ITEM | SYMBOL | CONDITION | MIN. | TYP. | MAX. | UNIT |
|---|---|---|---|---|---|---|
| Panel Transmittance | T | θ=0° | 3.9 | 4.2 | -- | % |
| Luminance | L | θ=0° | 200 | 220 | -- | cd/m2 |
| Luminance Uniformity | YU | 9points | 75 | 80 | -- | % |
| Contrast Ratio | CR | Point-5 | -- | 200 | -- | - |
| Response Time | Rr+Tf | Point-5 | -- | 25 | -- | ms |
| Viewing Angle (Left) | Θ L | CR>10 θ=0° | -- | 70 | -- | Deg. |
| Viewing Angle (Right) | Θ R | CR>10 θ=0° | -- | 70 | -- | Deg. |
| Viewing Angle (Up) | Θ U | CR>10 θ=0° | -- | 40 | -- | Deg. |
Note: Backlight circuit: VF=9~10.5V, IF=120mA, LED configuration: 3*6=18 dices.
4. Application Guidelines & Critical Notes
Intended Use
- Industrial control panels and human-machine interfaces (HMIs) requiring a standard 7.0-inch display.
- Embedded systems requiring a 1024x600 resolution display with a standard parallel RGB interface.
Critical Design Considerations
- Power Supply Rails: Provide stable voltages: VDD (3.3V Typ), AVDD (8.7V Typ), VGH (23V Typ), VGL (-6.8V Typ), and VCOM (2.4V Typ). These are critical for proper operation.
- Backlight Driving: The backlight uses 18 white LEDs (3*6 configuration) requiring VF=9~10.5V and IF=120mA. A constant-current LED driver is required.
- Power Sequence: Strictly follow the specified power on/off sequence: Power On: DVDD → AVDD/VGL → VGH → Video & Logic Signal → Backlight. Incorrect sequencing may damage the module.
- Timing Constraints: Match the DCLK frequency (51.2 MHz Typ) and timing specifications (tH, tV, tHB, tVB) in the host controller.
- Reset (RSTB): RSTB is active low. Connect with an RC reset circuit (R=10KΩ, C=1μF) for stability and normally pull high.
- Dithering (DITH): DITH = "H" for 8-bit resolution (last 2 bits truncated), DITH = "L" (default) for 6-bit resolution.
- Display Orientation: SHLR and UPDN pins control display orientation for flexible mounting.
- Temperature Limits: Operating and storage temperature ranges are not explicitly listed in the excerpt but are typically -20°C to +70°C and -30°C to +80°C for similar modules.
Handling & Compliance
- The module is ROHS Compliant.
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass – handle with care.
- Avoid bending the FPC sharply, especially near the connector interface.
- Do not attempt to disassemble or process the LCD Module.
- NC terminals should be open. Do not connect anything.
- If the logic circuit power is off, do not apply the input signals.
5. Conclusion & Design-In Support
The LS070T08-R-V1 specification details a standard 7.0-inch WSVGA display module with a 48-pin parallel RGB interface, 200 cd/m² luminance, 200:1 contrast ratio, and clear power sequencing requirements — an excellent choice for applications requiring a reliable and standard 7.0-inch display.
Key Strengths
- WSVGA Resolution (1024×600): Provides standard image quality for a 7.0-inch display.
- Standard 48-pin Interface: Parallel RGB interface with straightforward connectivity.
- Detailed Timing Specifications: Clear DE mode and SYNC mode timing tables for easy integration.
- Clear Power Sequence: Explicit power on/off sequence with timing constraints for reliable operation.
- ROHS Compliant: Environmentally friendly design.
- Recent Revision (2024-03-20): Up-to-date product specification.
Main Design Focus
- The critical design task is properly generating the power supply sequence (DVDD → AVDD/VGL → VGH → Video → Backlight) and matching the DCLK frequency and horizontal/vertical timing in the host controller.
- Supporting requirements: Provide stable VDD (3.3V), AVDD (8.7V), VGH (23V), VGL (-6.8V), and VCOM (2.4V). Design a constant-current backlight driver (IF=120mA, VF=9~10.5V). Follow the reset timing and ESD precautions.
This module is an excellent choice for industrial control panels, HMIs, and any embedded system requiring a standard 7.0-inch parallel RGB display with clear timing specifications.
