Top HD Display Interfaces for Industrial Control Boards

Various port types such as HDMI, DVI, RGB, LVDS, MIPI, eDP, mini-LVDS, and V-By-One are commonly used to convert different graphic signals. These port types are particularly relevant in industries such as video matrix and digital video recorder systems for the security sector, large commercial displays for the display industry, and interactive displays for various industries. Effective protocol conversion is essential to ensure the seamless transmission of visual signals across different devices and systems.

With the rapid development of the electronics industry in recent years, intelligent display devices have achieved significant progress, and high-definition displays have become increasingly popular among consumers. There are currently various high-definition display protocol interfaces available, including RGB, LVDS, MIPI, eDP, HDMI, miniLVDS, and V-by-One. However, signal protocol conversion is often encountered during product design by solution companies, which poses significant challenges for EMI radiation emission.

LVDS interface

LVDS, which stands for Low Voltage Differential Signaling, is a type of low-voltage differential signal technology interface. It was developed by the US-based company NS to overcome the disadvantages of transmitting broadband high-rate data using TTL-level technology, such as high power consumption and high EMI electromagnetic interference.

The LVDS output interface uses a very low voltage swing (about 350mV) to transmit data via differential signaling on two PCB traces or a pair of balanced cables, i.e., low-voltage differential signal transmission. By adopting the LVDS output interface, signals can be transmitted at speeds of several hundred Mbit/s on differential PCB traces or balanced cables. Due to the use of low voltage and low current drive, LVDS achieves low noise and low power consumption.

Two typical LVDS digital interfaces: GMSL and FPD Link.

MIPI interface

The MIPI Alliance has defined a set of interface standards to standardize internal interfaces of mobile devices, such as cameras, displays, baseband, and RF interfaces, thereby increasing design flexibility, and reducing costs, design complexity, power consumption, and EMI.

• High speed, with a throughput of 4Gbps and a rate of 1Gbps per lane.
• Low power consumption, with a differential swing of 200mV and a common mode voltage of 200mV.
• Noise suppression.
• Fewer pins, making PCB layout more convenient.

MIPI is a relatively new standard, and its specifications are constantly being revised and improved. Currently, the most mature interface applications are DSI (Display Serial Interface) and CSI (Camera Serial Interface). CSI/DSI refers to the fact that they are designed for camera or display applications, and both have complex protocol structures.

HDMI interface

1. High-Definition Multimedia Interface
2. A digital interface that transmits both video and audio simultaneously.
3. Transmits uncompressed video data and compressed/uncompressed digital audio data.

eDP interface (embedded DisplayPort)

The eDP interface is a new type of digital interface based on the DisplayPort architecture and protocol that has emerged in recent years. This type of interface can achieve high-speed simultaneous transmission of multiple data and has low electromagnetic interference. As a result, it is gradually replacing the traditional Low Voltage Differential Signaling (LVDS) interface. The eDP interface defaults to 30P but can be customized to 40P or 51P.

SSD2828QN4 (RGB to MIPI)

1. Input signal: RGB (18/24-bit)
2. Output signal: MIPI video mode
3. Maximum supported resolution: 1920×1200
4. Maximum transmission speed: 1 GHz
5. Package: QFP-128 pin, 14×14 mm

SSD2828QL9 (RGB to MIPI, MCU to MIPI)

1. Input signal: RGB (18/24bit) or MCU8080 (8/16bit)
2. Output signal: MIPI command mode or video mode
3. Maximum supported resolution: 1920*1200
4. Maximum transmission speed: 1GHz
5. QFP-128Pin, 14*14mm package size.

SSD2828TQL9 (RGB to MIPI, MCU to MIPI)

1. Input signal: RGB (18/24-bit) or MCU8080 (8/16-bit)
2. Output signal: MIPI command mode or video mode
3. Maximum supported resolution: 2280 x 1080
4. Maximum transfer speed: 1.25GHz
5. QFP-128Pin package, size 14mm x 14mm.

SSD2829QL9 (RGB to MIPI, MCU to MIPI)

1. Input signal: RGB (48-bit), MCU8080 (48-bit)
2. Output signal: MIPI command mode, video mode
3. Maximum supported resolution: 3840*2160
4. Maximum transmission speed: 1.5GHz
5. Package: QFP-128Pin, 14*14mm.

SSD2830QL9 (RGB to MIPI, MCU to MIPI)

1. Input signal: RGB (48-bit) and MCU8080 (48-bit)
2. Output signal: MIPI C-PHY
3. Maximum supported resolution: 3840 x 2160
4. Maximum transmission speed: 2.85GHz
5. QFP-128Pin package, size 14mm x 14mm.

SSD2832QL9 (RGB to MIPI, MCU to MIPI)

1. Input signal: RGB (60-bit), MCU8080 (60-bit)
2. Output signal: Compatible with MIPI D-PHY and MIPI C-PHY
3. Maximum supported resolution: 3840×2160
4. Maximum transmission speed: C-PHY 2.85GHz, D-PHY 1.5GHz
5. Package: QFP-128Pin, 14x14mm

NCS8801S (embedded DisplayPort)

1. Input signals can be RGB or LVDS.
2. The output signal is eDP.
3. The maximum supported resolution is 2560*1600 with 24-bit color depth and a 60Hz refresh rate.
4. Low power consumption of up to 70mW.
5. Packaged in a QFN of 7mm*7mm.

NCS8803 (HDMI to eDP)

1. Input signal: HDMI
2. Output signal: eDP
3. Maximum supported resolution: 2560*1600, 24bit, 60Hz
4. Power consumption as low as 150mW
5. Package: QFN, 7mm*7mm.

NCS8805 scaler (RGB/LVDS to eDP)

1. Input signal: RGB or LVDS
2. Output signal: eDP
3. Maximum supported resolution: 2560*1600 24bit 60Hz
4. Low power consumption of up to 150mW
5. Packaged in QFN 7mm*7mm
6. Supports a maximum scaling ratio of 1:2.

NCS8806 Scaler（LVDS to V-By-One）

1. Input signal: LVDS
2. Output signal: V-By-One
3. Maximum supported resolution: 4K (3840*2160 24bit 60Hz)
4. Package: TQFP 14mm*14mm
5. Maximum scaling ratio supported: 1:2
6. Power consumption is as low as 300mW.

NCS8807 Scaler（LVDS to mini-LVDS）

1. Input signal: LVDS
2. Output signal: mini-LVDS
3. Maximum supported resolution: 4K (3840*2160 24bit 60Hz)
4. Package size: LQFP14mm*14mm
5. Maximum scaling ratio supported: 1:2
6. Power consumption as low as 400mW.

• The RGB TTL interface signal type is TTL level, and the signal contains RGB666 or RGB888 data, as well as horizontal and vertical sync signals and clock signals.
• The LVDS interface signal type is LVDS (Low Voltage Differential Signaling), and the signal contains RGB data as well as horizontal and vertical sync signals and clock signals.
• The MIPI DSI interface signal type is also LVDS, and the signal contains video stream data and control commands.
• In simple terms, LVDS and MIPI have the same physical wiring, which consists of 5 pairs of differential signals, but they transmit different types of data due to different software protocols.

Related:

1. DAC Chip Basics, Functions, Architectures & Challenges
2. RGB vs ARGB: Choosing the Perfect PC Light
3. Convolutional Neural Networks Made Simple for Everyone

Disclaimer: This article is created by the original author. The content of the article represents their personal opinions. Our reposting is for sharing and discussion purposes only and does not imply our endorsement or agreement. If you have any objections, please get in touch with us through the provided channels.