LS070T17-R-V1: 7.0-Inch a-Si TFT LCD Module, 800×480 Resolution, 24-bit RGB Interface, 50-Pin, Driver IC EK9713/EK7320, Transmissive, 6 O'Clock
Product Subtitle / Keywords
7.0 Inch Display, 800(RGB)×480 Resolution, Transmissive a-Si TFT-LCD Module, 24-bit RGB Interface, 50-Pin Connector, Driver IC EK9713 (Main LCD Driver) / EK7320, COG+FPC+B/L, Display Colors 16.7M, Backlight: White LED 27 Chips Parallel, Viewing Direction: 6 O'Clock, VCOM: 3.8V, DVDD: 3.3V, VGH: 16V (Typ), VGL: -7V (Typ), AVDD: 10.8V (Typ), Operating Temp: -20°C to +70°C, Storage Temp: -30°C to +80°C, Contrast Ratio: 500 Typ, Luminance: 400 cd/m², Lesson Smart Display Technology Co., Ltd
1. Executive Summary & Product Positioning
The LS070T17-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) serves as the definitive technical document, defining its general description (including a 800(RGB)*480 resolution and 16.7M color display), physical features, outline dimensions, absolute maximum ratings, electrical characteristics (including all critical voltage rails), pin assignments for the 50-pin connector, 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 24-bit 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, 6 O'CLOCK viewing direction.
- Display Format: Graphic 800(RGB) × 480 pixels (WVGA resolution).
- Module Construction: COG+FPC+B/L (Chip-On-Glass + Flexible Printed Circuit + Backlight).
- Interface Type: 24-bit Parallel RGB Interface.
- Driver IC: EK9713 (Main LCD Driver) / EK7320.
- Pin Count: 50-pin connector.
- Backlight: White LED 27 Chips (Parallel configuration), IF = 180mA, VF = 9V.
- Display Colors: 16.7M (via Dithering pin setting for 8-bit resolution).
3. Exhaustive Technical Specifications
3.1 Mechanical & Physical Specifications
| Module Model | LS070T17-R-V1 |
| LCD Size (Diagonal) | 7.0 inch |
| Display Type | Transmissive a-Si TFT-LCD |
| Resolution | 800(RGB) × 480 Dots |
| Viewing Direction | 6 O'CLOCK |
| Module Size (H×V×D) | 164.86 × 99.96 × 3.5 mm |
| Active Area (H×V) | 154.08 × 85.92 mm |
| Number of Dots | 800(RGB) × 480 pixels |
| Module Type | COG+FPC+B/L |
| Driver IC | EK9713 / EK7320 |
| Backlight Type | White LED 27 CHIPS Parallel |
| Display Colors | 16.7M (8-bit via DITH pin) |
| Interface | 24 bit RGB (Parallel) |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Supplier | 立信(万安)智显科技有限公司 (Lesson Smart Dispaly Technology Co.,Ltd) |
| Document Version | Revision 1.0 |
3.2 Electrical & Interface Specifications
3.2.1 Pin Description (50-pin Connector)
The module uses a 50-pin interface with a 24-bit RGB parallel interface, power, and control signals.
| Pin No. | Symbol | Description |
|---|---|---|
| 1,2 | V LEDA+ | Power for LED backlight (Anode) |
| 3,4 | V LED- | Power for LED backlight (Cathode) |
| 5 | GND | Power ground |
| 6 | VCOM | Common Voltage |
| 7 | DVDD | Digital Power |
| 8 | MODE | DE/SYNC mode select. Normally pull high H:DE mode. L:HSD/VSD mode |
| 9 | DE | Data Enable signal |
| 10 | VSD | Vertical sync input. Negative polarity |
| 11 | HSD | Horizontal sync input. Negative polarity |
| 12-19 | B7-B0 | Blue Data Input (MSB to LSB) |
| 20-27 | G7-G0 | Green Data Input (MSB to LSB) |
| 28-35 | R7-R0 | Red Data Input (MSB to LSB) |
| 36,38,48 | GND | Power ground |
| 37 | DCLK | Clock input |
| 39 | SHLR | Left or Right Display Control |
| 40 | UPDN | Up/Down Display Control |
| 41 | VGH | Positive Power for TFT |
| 42 | VGL | Negative Power for TFT |
| 43 | AVDD | Analog Power |
| 44 | RSTB | Global reset pin. Active low. Suggest connecting with an RC reset circuit (R=10KΩ, C=1μF). Normally pull high. |
| 45,49,50 | NC | Not connect |
| 46 | VCOM | Common Voltage |
| 47 | DITH | Dithering setting. DITH="H": 6bit resolution (last 2 bit of input data truncated). DITH="L": 8bit resolution (default setting). |
3.2.2 Absolute Maximum Ratings
| Item | Symbol | Min. | Max. | Unit |
|---|---|---|---|---|
| Supply voltage | VDD | -0.3 | 3.3 | V |
| Supply voltage | VCI | -0.3 | 5.0 | V |
| Operating temperature | TOPR | -20 | 70 | °C |
| Storage temperature | TSTR | -30 | 80 | °C |
3.2.3 Electrical Characteristics (Typical Operation Conditions)
| Item | Symbol | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Supply voltage | VDD | 3.2 | 3.3 | 3.4 | V |
| Supply voltage | VGH | 15 | 16 | 17 | V |
| Supply voltage | VGL | -8 | -7 | -6 | V |
| Supply voltage | AVDD | 10.0 | 10.8 | 11.5 | V |
| Common Voltage | VCOM | 3.7 | 3.8 | 3.9 | V |
| LED Forward Voltage | VF | --- | 9.0 | --- | V |
| LED Forward Current | IF | --- | 180 | --- | mA |
| Input Voltage (L level) | VIL | 0 | --- | 0.1*VDD | V |
| Input Voltage (H level) | VIH | 0.9*VDD | --- | VDD | V |
3.3 Electro-Optical Characteristics
| Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Response time | Tr + Tf | θx = θy =0 | --- | 25 | 50 | ms |
| Contrast Ratio | CR | θx = θy =0 | 400 | 500 | --- | --- |
| Transmittance | T% | θx = θy =0 | 4.36 | 4.95 | --- | % |
| Color Chromaticity (White) | W x | θx = θy =0 | --- | 0.312 | --- | --- |
| Color Chromaticity (White) | W y | θx = θy =0 | --- | 0.331 | --- | --- |
| Viewing angle (Top: θT) | θT | CR > 10 | 60 | 70 | --- | Deg. |
| Viewing angle (Bottom: θB) | θB | CR > 10 | 60 | 70 | --- | Deg. |
| Viewing angle (Left: θL) | θL | CR > 10 | 40 | 50 | --- | Deg. |
| Viewing angle (Right: θR) | θR | CR > 10 | 60 | 70 | --- | Deg. |
| Luminance (IF = 180mA) | L | --- | --- | 400 | --- | cd/m2 |
4. Application Guidelines & Critical Notes
Intended Use
- Industrial control panels and human-machine interfaces (HMIs).
- Embedded systems requiring a standard 7.0-inch display with a 24-bit RGB parallel interface and 800×480 resolution.
Critical Design Considerations
- Power Supply Rails: Provide stable voltages: VDD (3.3V Typ), AVDD (10.8V Typ), VGH (16V Typ), VGL (-7V Typ), and VCOM (3.8V Typ). These are critical for proper TFT operation.
- Backlight Driving: The backlight uses 27 white LED chips in parallel. A constant-current LED driver is required with an IF = 180 mA and VF = 9.0V (Typ).
- Interface Modes: Pin 8 (MODE) selects between DE mode (pull high) and SYNC mode (pull low). Ensure the host controller matches the selected mode. When using DE mode, ensure the DE signal is properly provided.
- Display Orientation: Pins SHLR (Pin 39) and UPDN (Pin 40) allow for flexible display orientation control.
- Dithering Setting: Pin 47 (DITH) controls the color resolution. Default is "L" for 8-bit resolution (16.7M colors). Set to "H" for 6-bit resolution.
- Reset (RSTB): Pin 44 (RSTB) is an active-low global reset pin. It is recommended to connect with an RC reset circuit (R=10KΩ, C=1μF) for stability and normally pull high.
- Temperature Limits: Operating Temperature: -20°C to +70°C. Storage Temperature: -30°C to +80°C.
- Backlight Circuit: IF=180mA, VF=9V for the LED backlight. Ensure proper LED driver design for the 27 CHIPS Parallel configuration.
Handling & Compliance
- Observe standard ESD precautions during handling and assembly.
- The module contains fragile glass and FPC – handle with care. Handling polarizer may be easily damaged.
- Avoid bending the FPC sharply, especially near the connector interface.
- Do not attempt to disassemble or process the LCD Module.
- All NC terminals should be open. Do not connect them to ground or power.
- If the logic circuit power is off, do not apply the input signals.
5. Conclusion & Design-In Support
The LS070T17-R-V1 specification details a standard 7.0-inch WVGA display module with a 24-bit parallel RGB interface, driver IC EK9713/EK7320, 16.7M color support (via DITH pin), and high contrast ratio (500 Typ) — an excellent choice for applications requiring a reliable and standard 7.0-inch display.
Key Strengths
- WVGA Resolution (800×480): Suitable standard resolution for 7.0-inch displays.
- 24-bit RGB Parallel Interface: Standard, easy-to-use parallel interface with DE/SYNC mode selection.
- High Contrast Ratio (500 Typ): Provides good image quality.
- High Luminance (400 cd/m²): Suitable for most indoor applications.
- Wide Viewing Angles: 60°-70° typical in top, bottom, and right directions.
- Wide Operating Temperature Range: -20°C to +70°C suitable for industrial environments.
- Flexible Orientation Control: Via SHLR and UPDN pins for versatile mounting.
- 16.7M Colors (8-bit via DITH): Offers rich color display capability.
- Driver IC EK9713/EK7320: Specific driver for optimized display performance.
Main Design Focus
- The critical design task is properly configuring the host processor's 24-bit parallel RGB interface to match the timing requirements of the EK9713 driver IC and providing the correct power sequence (VDD → AVDD/VGH/VGL → Video → Backlight).
- Supporting requirements: Provide stable VDD (3.3V), AVDD (10.8V), VGH (16V), VGL (-7V), and VCOM (3.8V) power supplies. Provide a constant-current backlight driver (IF=180mA, VF=9V). Follow the reset timing with RC circuit and ESD precautions. Set the MODE pin correctly for the selected interface mode (DE or SYNC).
This module is an excellent choice for industrial control panels, HMIs, and any embedded system requiring a standard 7.0-inch display with a direct parallel RGB interface and high brightness.
