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The Most Common TFT Display Interfaces

Views: 332     Author: Reshine Display     Publish Time: 2023-12-18      Origin: Site


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The Most Common TFT Display Interfaces

A TFT, or thin-film transistor, is a display that allows each pixel to be controlled by a transistor and addressed separately. A TFT LCD module consists of a TFT LCD panel, one or more COG or COB driver ICs, a backlight, and an interface. An interface is a shared boundary that allows two separate components of a computer system to exchange data. TFT display production has improved as the technology has been mass-produced, and the price has come down.

There are now several TFT display interface technologies available. The best interface to select is determined by specific end-product considerations. Many TFT display interfaces have been developed in recent years, including LVDS (Low-Voltage Differential Signaling), parallel, SPI (Serial Peripheral Interface), and I2C or I2C (also known as I squared C) display, among others.

1. Serial Peripheral Interface (SPI)

An SPI, or Serial Peripheral Interface, allows two devices to exchange data. It has the advantage of being more intuitive and simple to wire than parallel ones. SPI allows for longer cables because there is significantly less contact or crosstalk in the cable. SPI has the disadvantage of being slow and only allowing writing to the TFT LCD panel. Because of this, SPI is commonly used in smaller TFT LCD screens. However, if your project requires a built-in LCD controller, an MCU Parallel interface might be a good fit.

2. MCU Parallel Interface

An MCUPI or MCU Parallel interface is typically quite simple and requires display RAM. There are two common types; the first is 6800, and the second is 8080. 6800 is RD/nWR and E, while 8080 is nRD and nWR. The RGB interface is a distinct type of parallel interface. Display RAM is not required. The MCU updates the TFT screen directly by sending Red, Green, and Blue sub-pixel data (16/18/24 bits) and timing signals. The RGB interface provides a fast connection but necessitates more data cables and has more complicated controls.

3. A high-speed serial interface

MIPI Display Serial Interface, a high-speed serial interface between a host CPU and a display module, enables the integration of displays to provide high performance, low power, and low electromagnetic interference (EMI) while also reducing the number of pins and retaining vendor compatibility. MIPI DSI can be used by designers to transmit stereoscopic content while also enabling excellent color rendering in the most demanding picture and video situations.

4. Low-Voltage Differential Signaling

Low-voltage differential signaling, or LVDS, is a high-speed, long-distance digital interface that transmits serial data (one bit at a time) via two copper wires 180 degrees apart. This configuration makes noise easier to identify and filter, lowering noise emissions. The E70RA-HW520-C from Reshine Display is a versatile display that employs this technology. The monitor in question is a 7.0′′ TFT with 1024600 pixels and a color depth maximum of 16.7M. A typical graphics controller can be used to program the inbuilt gate and source driver ICs in this display.


Many consumers are probably already familiar with HDMI. The High Definition Media Interface connector and cable definition support high-bandwidth video and audio streams. HDMI is a near-perfect substitute for analog video standards.

There are then a variety of interfaces to consider for your display project; whether you choose HDMI, LVDS, MIPI DSI, or the others mentioned, or simply can't decide, feel free to contact Reshine Display, where we can address use-case specific questions and provide additional details.

6. Advantages of the MIPI interface

MIPI is a high-speed display interface that is widely used in smartphones, tablets, laptop computers, automobiles, and other platforms. MIPI is an abbreviation for Mobile Industry Processor Interface. As the use of cameras and LCDs in automotive, IoT and multimedia applications grows, the industry demands display interface solutions that meet stringent power and performance requirements. Display Serial Interface (DSI) has traditionally been used by designers to connect TFT displays to application processors or system-on-chips (SoCs) in mobile applications such as smartphones. MIPI interfaces are now being used in new applications such as advanced driver assistance systems (ADAS), infotainment, wearables, and augmented/virtual reality head mount devices due to their demonstrated benefits and successful implementation. MIPI DSI has recently become a go-to interface for applications in the industrial, medical, and defense sectors.

The MIPI DSI was developed to connect the displays of cell phones and smart devices, and it is now the most widely used connection interface for these devices. This interface communicates with the display via LVDS signaling across a D-PHY layer over one, two, three, or four data pairs. In addition to the data lines, the MIPI interface includes a differential clock pair that clocks the signals at a high frequency. Because these clock and data lanes are triggered at low voltages, low-power displays are possible. Because this interface can signal data at a very fast rate, a significant amount of data can be delivered, exceeding the minimal frame rate requirements. This means that MIPI interface displays with high resolution and good color rendering can be used for high-speed applications such as video transmission.

Although MIPI DSI interface microcontrollers are not commonly used in industry, graphics controllers can be used to support a processor that requires a MIPI interface. MIPI interface displays are ideal for displaying images with a high level of detail and color. In greater color, more data must be provided for each pixel, and higher resolution means more pixels. This generates a significant amount of data, requiring a memory address for the minimum frame buffer to keep an image. Click here for 5.5 Inch Mipi Lcd Display.

MIPI offers several technological advantages for commercial applications, including low power consumption and EMI. Low EMI and low power consumption are achieved by a combination of factors such as low-voltage swings on high-speed physical layers and slew rate control, according to MIPI requirements. This allows developers to change the EMI profile of the physical layer interface to meet the EMI requirements of the end product.

MIPI-based displays are assisting in the development of AR/VR devices with higher pixel density (PPI), pixel resolution (BPC), and frame rates. MIPI provides product designers with a dependable specification for interacting with components to provide the required throughput while reducing pin count, energy consumption, and EMI as bandwidth demand increases. AR/VR designers use CSI-2 to connect cameras and high-end SoCs, as well as MIPI DSI to handle multiple displays (one for each eye).

Modern cameras, sensors, and displays are packed into today's vehicles. ADAS is used to enable features such as park assist, driver monitoring, blind-spot detection, night vision, and car security systems, among others. Furthermore, MIPI interconnects are used in cockpits and infotainment systems to connect many high-resolution displays. MIPI requirements in today's cars include CSI-2, DSI-2, C-PHY, and D-PHY. In addition, the MIPI Alliance developed the MIPI A-PHY, a physical layer specification for ADAS and self-driving cars (ADS). The A-PHY is also used in other surround sensor applications in automobiles, such as displays and cameras. While most MIPI specifications are designed for shorter distances in mobile devices, A-PHY has the potential to reach up to 15 meters in severe automotive conditions. A-PHY v1.0 supports up to 16 Gbps, with plans to expand to 24 Gbps, 48 Gbps, and beyond.

MIPI provides benefits such as speed and efficiency in display technologies, which are now required in all industries such as industrial, medical, automotive, and defense. The interface allows manufacturers to combine screens for high performance, low power, and low electromagnetic interference (EMI) while reducing pin count and maintaining vendor compatibility. MIPI DSI enables designers to achieve excellent color rendering for the most demanding image and video sequences, as well as support for stereoscopic content delivery. Reshine Display provides a selection of high-quality MIPI DSI high-speed displays to meet the demands of your application.

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